{"title":"Mastercool CO₂ \u0026 R744 Tools","description":"\u003cp\u003eMastercool CO₂ and R744 specialist tools for professional refrigeration engineers. Includes CO₂ infrared leak detectors, high-pressure regulators and nitrogen\/CO₂ system components. A low-competition niche with growing demand as R744 adoption increases in commercial refrigeration. UK delivery from Airconspares.\u003c\/p\u003e","products":[{"product_id":"javac-co2-pro-2-valve-transcritical-manifold","title":"2 Valve Transcritical CO2 manifold","description":"\u003ch2\u003eJavac FR4312-E25 CO2 Trans-Critical 2-Valve Manifold\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eJavac FR4312-E25\u003c\/strong\u003e is a professional \u003cstrong\u003e2-valve manifold designed specifically for CO2 trans-critical (R744) refrigeration systems\u003c\/strong\u003e. Rated to handle the extreme pressures of transcritical CO2 operation, it features CO2-compatible seals and materials throughout — making it an essential tool for engineers working on next-generation natural refrigerant systems.\u003c\/p\u003e\u003cp\u003eCO2 transcritical systems operate at significantly higher pressures than conventional refrigerants, requiring specialist equipment. Standard manifolds are not suitable for R744 applications.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for CO2 trans-critical (R744) systems\u003c\/strong\u003e – not suitable for use with standard refrigerants as a replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-pressure rated to 160 bar\u003c\/strong\u003e – handles the extreme operating pressures of transcritical CO2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCO2-compatible seals and materials\u003c\/strong\u003e – safe, reliable operation with R744\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-valve design\u003c\/strong\u003e – high and low side service valves for system diagnostics and charging\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4\" SAE connections\u003c\/strong\u003e – standard HVAC\/R fittings\u003c\/li\u003e\n\u003cli\u003ePart of the Javac CO2 Pro specialist range\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e FR4312-E25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible refrigerant:\u003c\/strong\u003e CO2 \/ R744 (transcritical)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve configuration:\u003c\/strong\u003e 2-valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax. working pressure:\u003c\/strong\u003e 160 bar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnections:\u003c\/strong\u003e 1\/4\" SAE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeals:\u003c\/strong\u003e CO2-compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Javac (Aspen Pumps Group)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCO2 transcritical refrigeration system servicing\u003c\/li\u003e\n\u003cli\u003eSupermarket and commercial refrigeration plant\u003c\/li\u003e\n\u003cli\u003eIndustrial CO2 heat pump commissioning\u003c\/li\u003e\n\u003cli\u003eNatural refrigerant system diagnostics and charging\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003e⚠️ Important:\u003c\/strong\u003e CO2 transcritical systems operate at very high pressures. Always use equipment rated for R744 transcritical operation. Do not use standard manifolds on CO2 transcritical systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrowse related products:\u003c\/strong\u003e\u003cbr\u003e\u003ca href=\"\/collections\/manifolds-gauges\"\u003eManifolds \u0026amp; Gauges\u003c\/a\u003e  |  \u003ca href=\"\/collections\/javac\"\u003eAll Javac Products\u003c\/a\u003e\u003c\/p\u003e","brand":"Javac","offers":[{"title":"Default Title","offer_id":57029838176633,"sku":"FR4312-E25","price":1082.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/JAVAC-CO2-Pro-2-Valve-Transcritical-Manifold-Ryan-Air-Conditioning-Spares-68945423171959.jpg?v=1775892079"},{"product_id":"55102-1400","title":"Mastercool 55102-1400 R744 CO₂ Low Pressure Replacement Gauge 70mm Oil Filled","description":"\u003ch1\u003eMastercool 55102-1400 — R744 CO2 Low Pressure Gauge 70mm Oil Filled\u003c\/h1\u003e\u003cp\u003eProfessional 70mm oil-filled low pressure gauge specifically designed for R744 (CO2) refrigeration systems. Dual scale display shows both psi and MPa measurements for accurate pressure monitoring in transcritical CO2 applications. Oil-filled design dampens needle vibration and protects internal components from harsh operating conditions.\u003c\/p\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eR744 CO2 Specific\u003c\/strong\u003e – Designed for transcritical CO2 refrigeration systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e70mm Gauge Face\u003c\/strong\u003e – Large, easy-to-read dial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil-Filled Design\u003c\/strong\u003e – Dampens vibration, protects internals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Scale\u003c\/strong\u003e – psi and MPa measurements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Pressure\u003c\/strong\u003e – Optimised for LP side monitoring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Grade\u003c\/strong\u003e – Built to Mastercool standards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction\u003c\/strong\u003e – Withstands harsh CO2 system conditions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eModel: 55102-1400\u003c\/li\u003e\n\u003cli\u003eType: Low pressure gauge\u003c\/li\u003e\n\u003cli\u003eRefrigerant: R744 (CO2)\u003c\/li\u003e\n\u003cli\u003eGauge Size: 70mm diameter\u003c\/li\u003e\n\u003cli\u003eFill: Oil-filled\u003c\/li\u003e\n\u003cli\u003eScale: psi and MPa\u003c\/li\u003e\n\u003cli\u003eApplication: CO2 refrigeration systems\u003c\/li\u003e\n\u003cli\u003eConnection: 1\/4\" SAE (standard)\u003c\/li\u003e\n\u003cli\u003eSKU: 55102-1400\u003c\/li\u003e\n\u003cli\u003eBarcode: 700376116847\u003c\/li\u003e\n\u003cli\u003eHS Code: 90262080\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eR744 (CO2) Refrigeration:\u003c\/h2\u003e\u003cp\u003eR744 (carbon dioxide) is increasingly used in commercial refrigeration as a natural, environmentally friendly refrigerant. CO2 systems operate at significantly higher pressures than traditional refrigerants, requiring specialised gauges designed to handle transcritical CO2 pressure ranges. This low pressure gauge is specifically calibrated for the LP side of CO2 systems.\u003c\/p\u003e\u003ch2\u003eOil-Filled Gauge Benefits:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration Dampening\u003c\/strong\u003e – Oil fill reduces needle flutter for accurate readings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Protection\u003c\/strong\u003e – Protects internal mechanism from shock and vibration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Life\u003c\/strong\u003e – Reduces wear on internal components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarsh Environment\u003c\/strong\u003e – Withstands demanding commercial refrigeration conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent Performance\u003c\/strong\u003e – Maintains accuracy over time\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCommercial CO2 refrigeration systems\u003c\/li\u003e\n\u003cli\u003eTranscritical CO2 installations\u003c\/li\u003e\n\u003cli\u003eSupermarket refrigeration\u003c\/li\u003e\n\u003cli\u003eCold storage facilities\u003c\/li\u003e\n\u003cli\u003eCO2 cascade systems\u003c\/li\u003e\n\u003cli\u003eNatural refrigerant applications\u003c\/li\u003e\n\u003cli\u003eCO2 system commissioning and service\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eComplete R744 CO2 Gauge Set:\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"\/products\/mastercool-55102-2400-r744-co2-hp-gauge-70mm-oil-filled-psi-mpa\"\u003e55102-2400 — R744 CO2 High Pressure Gauge 70mm\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eR744 CO2 Manifolds:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55103-a-r744-co2-2-valve-piston-manifold-cl-1-1-4-sae\"\u003e55103-A — R744 CO2 2-Valve Piston Manifold 1\/4\" SAE\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55661-a-r744-co2-2-v-piston-manifold-cl-1-1-4-3-150\"\u003e55661-A — R744 CO2 2-Valve Piston Manifold 3-150\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55102-a-r744-co2-2-valve-piston-manifold-body-only-1-4-sae\"\u003e55102-A — R744 CO2 2-Valve Piston Manifold Body Only\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy Use CO2-Specific Gauges?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect Pressure Range\u003c\/strong\u003e – Calibrated for high CO2 operating pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccurate Readings\u003c\/strong\u003e – Proper scale divisions for CO2 systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety\u003c\/strong\u003e – Designed to handle transcritical CO2 pressures safely\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Standards\u003c\/strong\u003e – Meet requirements for CO2 refrigeration service\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Units\u003c\/strong\u003e – psi and MPa for international applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation:\u003c\/h2\u003e\u003cp\u003eConnect gauge to low pressure port on CO2 manifold using 1\/4\" SAE connection. Ensure connection is secure and leak-free. The oil-filled design means the gauge should be mounted in an upright position for optimal performance. Avoid over-tightening connections which may damage threads.\u003c\/p\u003e\u003ch2\u003eMaintenance:\u003c\/h2\u003e\u003cp\u003eInspect gauge regularly for damage or leaks. Check that needle returns to zero when not under pressure. If gauge becomes damaged or shows signs of oil leakage, replace immediately. Store in protective case when not in use to prevent damage to gauge face and connection threads.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eProfessional R744 CO2 low pressure gauge\u003c\/strong\u003e with 70mm oil-filled design. Dual psi\/MPa scale for transcritical CO2 refrigeration systems. Built for commercial refrigeration service.\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164099453305,"sku":"55102-1400","price":70.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/55102-1400.png?v=1777442793"},{"product_id":"55102-2400","title":"Mastercool 55102-2400 R744 CO₂ High Pressure Replacement Gauge 70mm Oil Filled","description":"\u003ch1\u003eMastercool 55102-2400 — R744 CO2 High Pressure Gauge 70mm Oil Filled\u003c\/h1\u003e\u003cp\u003eProfessional 70mm oil-filled high pressure gauge specifically designed for R744 (CO2) refrigeration systems. Dual scale display shows both psi and MPa measurements for accurate pressure monitoring in transcritical CO2 applications. Oil-filled design dampens needle vibration and protects internal components from harsh operating conditions typical of high-pressure CO2 systems.\u003c\/p\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eR744 CO2 Specific\u003c\/strong\u003e – Designed for transcritical CO2 refrigeration systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e70mm Gauge Face\u003c\/strong\u003e – Large, easy-to-read dial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil-Filled Design\u003c\/strong\u003e – Dampens vibration, protects internals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Scale\u003c\/strong\u003e – psi and MPa measurements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Pressure\u003c\/strong\u003e – Optimised for HP side monitoring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Grade\u003c\/strong\u003e – Built to Mastercool standards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction\u003c\/strong\u003e – Withstands extreme CO2 system pressures\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eModel: 55102-2400\u003c\/li\u003e\n\u003cli\u003eType: High pressure gauge\u003c\/li\u003e\n\u003cli\u003eRefrigerant: R744 (CO2)\u003c\/li\u003e\n\u003cli\u003eGauge Size: 70mm diameter\u003c\/li\u003e\n\u003cli\u003eFill: Oil-filled\u003c\/li\u003e\n\u003cli\u003eScale: psi and MPa\u003c\/li\u003e\n\u003cli\u003eApplication: CO2 refrigeration systems\u003c\/li\u003e\n\u003cli\u003eConnection: 1\/4\" SAE (standard)\u003c\/li\u003e\n\u003cli\u003eSKU: 55102-2400\u003c\/li\u003e\n\u003cli\u003eBarcode: 700376116854\u003c\/li\u003e\n\u003cli\u003eHS Code: 90262080\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eR744 (CO2) High Pressure Applications:\u003c\/h2\u003e\u003cp\u003eR744 (carbon dioxide) systems operate at significantly higher pressures than traditional refrigerants, particularly on the high-pressure side where transcritical operation can exceed 1,400 psi (10 MPa). This high pressure gauge is specifically calibrated for the HP side of CO2 systems, providing accurate readings across the full operating range of transcritical CO2 refrigeration.\u003c\/p\u003e\u003ch2\u003eOil-Filled Gauge Benefits:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration Dampening\u003c\/strong\u003e – Oil fill reduces needle flutter for accurate readings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Protection\u003c\/strong\u003e – Protects internal mechanism from shock and vibration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Life\u003c\/strong\u003e – Reduces wear on internal components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarsh Environment\u003c\/strong\u003e – Withstands demanding commercial refrigeration conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Pressure Stability\u003c\/strong\u003e – Maintains accuracy under extreme CO2 pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent Performance\u003c\/strong\u003e – Maintains accuracy over time\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCommercial CO2 refrigeration systems\u003c\/li\u003e\n\u003cli\u003eTranscritical CO2 installations\u003c\/li\u003e\n\u003cli\u003eSupermarket refrigeration\u003c\/li\u003e\n\u003cli\u003eCold storage facilities\u003c\/li\u003e\n\u003cli\u003eCO2 cascade systems\u003c\/li\u003e\n\u003cli\u003eNatural refrigerant applications\u003c\/li\u003e\n\u003cli\u003eCO2 system commissioning and service\u003c\/li\u003e\n\u003cli\u003eHigh-pressure side monitoring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eComplete R744 CO2 Gauge Set:\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"\/products\/mastercool-55102-1400-r744-co2-low-pressure-gauge-70mm-oil-filled\"\u003e55102-1400 — R744 CO2 Low Pressure Gauge 70mm\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eR744 CO2 Manifolds:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55103-a-r744-co2-2-valve-piston-manifold-cl-1-1-4-sae\"\u003e55103-A — R744 CO2 2-Valve Piston Manifold 1\/4\" SAE\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55661-a-r744-co2-2-v-piston-manifold-cl-1-1-4-3-150\"\u003e55661-A — R744 CO2 2-Valve Piston Manifold 3-150\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55102-a-r744-co2-2-valve-piston-manifold-body-only-1-4-sae\"\u003e55102-A — R744 CO2 2-Valve Piston Manifold Body Only\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy Use CO2-Specific High Pressure Gauges?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect Pressure Range\u003c\/strong\u003e – Calibrated for extreme CO2 operating pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccurate Readings\u003c\/strong\u003e – Proper scale divisions for transcritical CO2 systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety\u003c\/strong\u003e – Designed to handle high CO2 pressures safely (up to 1,400+ psi)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Standards\u003c\/strong\u003e – Meet requirements for CO2 refrigeration service\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Units\u003c\/strong\u003e – psi and MPa for international applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTranscritical Operation\u003c\/strong\u003e – Essential for monitoring supercritical CO2 conditions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTranscritical CO2 Systems:\u003c\/h2\u003e\u003cp\u003eIn transcritical CO2 operation, the high-pressure side operates above the critical point of CO2 (1,070 psi \/ 7.38 MPa at 31°C). This requires specialised high-pressure gauges capable of accurately measuring pressures well above traditional refrigerant systems. The 55102-2400 is specifically designed for these demanding applications.\u003c\/p\u003e\u003ch2\u003eInstallation:\u003c\/h2\u003e\u003cp\u003eConnect gauge to high pressure port on CO2 manifold using 1\/4\" SAE connection. Ensure connection is secure and leak-free – CO2 systems operate at very high pressures. The oil-filled design means the gauge should be mounted in an upright position for optimal performance. Avoid over-tightening connections which may damage threads.\u003c\/p\u003e\u003ch2\u003eMaintenance:\u003c\/h2\u003e\u003cp\u003eInspect gauge regularly for damage or leaks. Check that needle returns to zero when not under pressure. If gauge becomes damaged or shows signs of oil leakage, replace immediately. Store in protective case when not in use to prevent damage to gauge face and connection threads. Never exceed the maximum pressure rating of the gauge.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eProfessional R744 CO2 high pressure gauge\u003c\/strong\u003e with 70mm oil-filled design. Dual psi\/MPa scale for transcritical CO2 refrigeration systems. Built for extreme pressure commercial refrigeration service.\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164099584377,"sku":"55102-2400","price":70.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/55102-2400.png?v=1777442804"},{"product_id":"55103-a","title":"Mastercool 55103-A R744 CO₂ 2-Valve Piston Manifold Body 70mm 1\/4\" SAE","description":"\u003ch1\u003eMastercool 55103-A — R744 CO2 2-Valve Piston Manifold Class 1 - 1\/4\" SAE\u003c\/h1\u003e\u003cp\u003eProfessional 2-valve piston manifold specifically designed for R744 (CO2) transcritical refrigeration systems. Features Class 1 construction with 1\/4\" SAE connections for reliable, leak-free operation in high-pressure CO2 applications. Precision-engineered piston valves provide smooth, accurate control of refrigerant flow in demanding commercial refrigeration service.\u003c\/p\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eR744 CO2 Specific\u003c\/strong\u003e – Designed for transcritical CO2 systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Valve Piston Design\u003c\/strong\u003e – Smooth, precise refrigerant control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass 1 Construction\u003c\/strong\u003e – Professional-grade durability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4\" SAE Connections\u003c\/strong\u003e – Standard HVAC\/R fittings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Pressure Rated\u003c\/strong\u003e – Handles extreme CO2 pressures safely\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Machined\u003c\/strong\u003e – Leak-free valve operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Grade\u003c\/strong\u003e – Built to Mastercool standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eModel: 55103-A\u003c\/li\u003e\n\u003cli\u003eType: 2-valve piston manifold\u003c\/li\u003e\n\u003cli\u003eRefrigerant: R744 (CO2)\u003c\/li\u003e\n\u003cli\u003eValves: 2 piston valves\u003c\/li\u003e\n\u003cli\u003eConstruction: Class 1\u003c\/li\u003e\n\u003cli\u003eConnections: 1\/4\" SAE\u003c\/li\u003e\n\u003cli\u003eApplication: CO2 refrigeration systems\u003c\/li\u003e\n\u003cli\u003eGauge Compatibility: 70mm CO2 gauges\u003c\/li\u003e\n\u003cli\u003eSKU: 55103-A\u003c\/li\u003e\n\u003cli\u003eBarcode: 700376133455\u003c\/li\u003e\n\u003cli\u003eHS Code: 90262080\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePiston Valve Technology:\u003c\/h2\u003e\u003cp\u003ePiston valves provide superior control compared to traditional ball valves, offering smooth, progressive refrigerant flow adjustment. The piston design creates a more precise seal and allows for fine-tuning of refrigerant flow rates – essential for accurate charging and recovery operations in high-pressure CO2 systems.\u003c\/p\u003e\u003ch2\u003eClass 1 Construction:\u003c\/h2\u003e\u003cp\u003eClass 1 construction indicates professional-grade materials and manufacturing standards designed to withstand the extreme pressures and demanding conditions of transcritical CO2 refrigeration. The robust construction ensures long-term reliability in commercial refrigeration service applications.\u003c\/p\u003e\u003ch2\u003eApplications:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCommercial CO2 refrigeration service\u003c\/li\u003e\n\u003cli\u003eTranscritical CO2 system commissioning\u003c\/li\u003e\n\u003cli\u003eCO2 refrigerant charging and recovery\u003c\/li\u003e\n\u003cli\u003eSupermarket refrigeration maintenance\u003c\/li\u003e\n\u003cli\u003eCold storage facility service\u003c\/li\u003e\n\u003cli\u003eNatural refrigerant applications\u003c\/li\u003e\n\u003cli\u003eCO2 cascade system service\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible R744 CO2 Gauges:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55102-1400-r744-co2-low-pressure-gauge-70mm-oil-filled\"\u003e55102-1400 — R744 CO2 Low Pressure Gauge 70mm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55102-2400-r744-co2-high-pressure-gauge-70mm-oil-filled\"\u003e55102-2400 — R744 CO2 High Pressure Gauge 70mm\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated CO2 Manifolds:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55102-a-r744-co2-2-valve-piston-manifold-body-only-1-4-sae\"\u003e55102-A — R744 CO2 2-Valve Piston Manifold Body Only\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55661-a-r744-co2-2-v-piston-manifold-cl-1-1-4-3-150\"\u003e55661-A — R744 CO2 2-Valve Piston Manifold 3-150\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy Use CO2-Specific Manifolds?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Rating\u003c\/strong\u003e – Designed for extreme CO2 operating pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety\u003c\/strong\u003e – Handles transcritical pressures safely (1,400+ psi)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak-Free Operation\u003c\/strong\u003e – Precision machining ensures reliable seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Standards\u003c\/strong\u003e – Meets requirements for CO2 service\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston Valve Control\u003c\/strong\u003e – Superior flow control vs. ball valves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability\u003c\/strong\u003e – Built for demanding commercial applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTranscritical CO2 Systems:\u003c\/h2\u003e\u003cp\u003eTranscritical CO2 refrigeration systems operate at significantly higher pressures than traditional refrigerant systems, particularly on the high-pressure side where pressures can exceed 1,400 psi (10 MPa). This requires specialised manifolds with high-pressure ratings, robust construction, and precision valves capable of controlling refrigerant flow under extreme conditions.\u003c\/p\u003e\u003ch2\u003e1\/4\" SAE Connections:\u003c\/h2\u003e\u003cp\u003eStandard 1\/4\" SAE flare connections provide compatibility with industry-standard hoses, gauges, and equipment. The SAE (Society of Automotive Engineers) standard ensures reliable, leak-free connections across different manufacturers' equipment.\u003c\/p\u003e\u003ch2\u003eOperating Instructions:\u003c\/h2\u003e\u003cp\u003eConnect CO2-specific gauges to manifold gauge ports. Attach 1\/4\" SAE hoses to service ports. Connect to CO2 system service valves. Open piston valves slowly and progressively for smooth refrigerant flow control. Monitor pressures carefully – CO2 systems operate at much higher pressures than traditional refrigerants. Close valves fully when service is complete.\u003c\/p\u003e\u003ch2\u003eMaintenance:\u003c\/h2\u003e\u003cp\u003eInspect piston valves regularly for smooth operation. Check all connections for leaks using appropriate leak detection methods. Keep valve stems clean and free from debris. Store in protective case when not in use. Never exceed maximum pressure ratings. Replace valve seals if leaks develop.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eProfessional R744 CO2 2-valve piston manifold\u003c\/strong\u003e with Class 1 construction and 1\/4\" SAE connections. Designed for transcritical CO2 refrigeration service with precision piston valve control.\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164099715449,"sku":"55103-A","price":247.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/55103-A-web.jpg?v=1777442813"},{"product_id":"55102-a","title":"Mastercool 55102-A R744 CO₂ Aluminium Manifold Body 70mm 1\/4\" SAE","description":"\u003cp\u003eThe \u003cstrong\u003eMastercool 55102-A\u003c\/strong\u003e is a professional R744 (CO2) 2-way aluminium manifold body designed for high-pressure transcritical CO2 refrigeration systems. Built with solid extruded aluminium and featuring advanced piston valve technology, this manifold delivers reliable performance in demanding commercial applications.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree-floating piston valve\u003c\/strong\u003e — Reduces wear and tear compared to standard twisting piston valves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual O-ring seal\u003c\/strong\u003e — O-ring with back-up O-ring provides superior sealing at high pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid extruded aluminium body\u003c\/strong\u003e — Long-lasting durability for professional use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge easy-to-grip knobs\u003c\/strong\u003e — Comfortable operation even with gloves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4\" SAE fittings\u003c\/strong\u003e — Standard connections for hose compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated hook\u003c\/strong\u003e — Convenient hanging during service work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerant:\u003c\/strong\u003e R744 (CO2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Type:\u003c\/strong\u003e 2-way piston design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Solid extruded aluminium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnections:\u003c\/strong\u003e 1\/4\" SAE fittings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge Compatibility:\u003c\/strong\u003e Class 1.0, 70mm, PSI\/MPa\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003eManifold body only with a hook. Gauges and hoses sold separately.\u003c\/p\u003e\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55103-a-fx234\" title=\"Mastercool 55103-A\"\u003e55103-A\u003c\/a\u003e — Complete manifold with oil-filled gauges (body + gauges)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55661-a\" title=\"Mastercool 55661-A\"\u003e55661-A\u003c\/a\u003e — Full assembly with gauges and 3×150cm steel braided hoses\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55102-2400\" title=\"High Pressure Gauge\"\u003e55102-2400\u003c\/a\u003e — High pressure replacement gauge (70mm, PSI\/MPa, R744)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55102-1400\" title=\"Low Pressure Gauge\"\u003e55102-1400\u003c\/a\u003e — Low pressure replacement gauge (70mm, PSI\/MPa, R744)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55360\" title=\"Steel Braided Hoses\"\u003e55360\u003c\/a\u003e — Set of 3 steel braided hoses for CO2\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-58102-pbr\" title=\"Carrying Case\"\u003e58102-PBR\u003c\/a\u003e — Plastic carrying case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eIdeal for commercial refrigeration technicians servicing transcritical CO2 systems, supermarket refrigeration, industrial cooling, and heat pump applications where R744 is the refrigerant.\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164100141433,"sku":"55102-A","price":151.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/55102-A.png?v=1777442823"},{"product_id":"55661-a","title":"Mastercool 55661-A R744 CO₂ Aluminium Manifold Gauge Set 2-Way 70mm 3×150cm","description":"\u003cp\u003eThe \u003cstrong\u003eMastercool 55661-A\u003c\/strong\u003e is a complete professional R744 (CO2) 2-way aluminium manifold assembly with oil-filled Class 1.0 gauges and three 150cm steel braided hoses. This ready-to-use kit is designed for high-pressure transcritical CO2 refrigeration systems and comes complete in a protective plastic carrying case.\u003c\/p\u003e\n\u003ch3\u003eComplete Assembly Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManifold body\u003c\/strong\u003e — Solid extruded aluminium with free-floating piston valves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil-filled Class 1.0 gauges\u003c\/strong\u003e — 70mm diameter with easy-to-read PSI\/MPa scales\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3× steel braided hoses\u003c\/strong\u003e — 150cm length, rated for 200 bar working pressure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlastic carrying case\u003c\/strong\u003e — Protective storage and transport (p\/n 58102-PBR)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree-floating piston valve\u003c\/strong\u003e — Reduces wear and tear compared to standard twisting piston valves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual O-ring seal\u003c\/strong\u003e — O-ring with back-up O-ring provides superior sealing at high pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass 1.0 precision gauges\u003c\/strong\u003e — Oil-filled 70mm gauges with clear PSI\/MPa pressure scales\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel braided hoses\u003c\/strong\u003e — High-pressure rated hoses provide leak-free connections for CO2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid extruded aluminium body\u003c\/strong\u003e — Long-lasting durability for professional use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge easy-to-grip knobs\u003c\/strong\u003e — Comfortable operation even with gloves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4\" SAE fittings\u003c\/strong\u003e — Standard connections throughout\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerant:\u003c\/strong\u003e R744 (CO2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Type:\u003c\/strong\u003e 2-way piston design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Solid extruded aluminium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge Class:\u003c\/strong\u003e 1.0 (precision)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge Diameter:\u003c\/strong\u003e 70mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge Units:\u003c\/strong\u003e PSI\/MPa\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnections:\u003c\/strong\u003e 1\/4\" SAE fittings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose Length:\u003c\/strong\u003e 3× 150cm (59\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose Construction:\u003c\/strong\u003e Steel braided PTFE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 200 bar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBurst Pressure:\u003c\/strong\u003e 800 bar\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSteel Braided Hose Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless steel rope O.D:\u003c\/strong\u003e 0.18mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBraiding:\u003c\/strong\u003e 4 wires\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePTFE tube section:\u003c\/strong\u003e 7mm × 5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSandwich layer:\u003c\/strong\u003e 0.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside diameter:\u003c\/strong\u003e 9mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 7\/16-20UNF\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55102-a\" title=\"Mastercool 55102-A\"\u003e55102-A\u003c\/a\u003e — Manifold body only with hook\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55103-a\" title=\"Mastercool 55103-A\"\u003e55103-A\u003c\/a\u003e — Manifold with gauges only (no hoses)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55102-2400\" title=\"High Pressure Gauge\"\u003e55102-2400\u003c\/a\u003e — High pressure replacement gauge (70mm, PSI\/MPa, R744)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55102-1400\" title=\"Low Pressure Gauge\"\u003e55102-1400\u003c\/a\u003e — Low pressure replacement gauge (70mm, PSI\/MPa, R744)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55601\" title=\"Single CO2 Hose\"\u003e55601\u003c\/a\u003e — Single steel braided hose for CO2\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55360\" title=\"Hose Set\"\u003e55360\u003c\/a\u003e — Set of 3 steel braided hoses for CO2\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-58102-pbr\" title=\"Carrying Case\"\u003e58102-PBR\u003c\/a\u003e — Replacement plastic carrying case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eComplete professional solution for commercial refrigeration technicians servicing transcritical CO2 systems, supermarket refrigeration, industrial cooling, and heat pump applications where R744 is the refrigerant. Ready to use straight from the case.\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164100764025,"sku":"55661-A","price":420.06,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/55661-A-web.jpg?v=1777442843"},{"product_id":"55745-bl","title":"Mastercool 55745-BL CO2 Infrared Leak Detector","description":"\u003ch2\u003eProfessional CO2 Infrared Leak Detection\u003c\/h2\u003e\n\u003cp\u003eThe Mastercool 55745-BL CO2 Infrared Leak Detector delivers precision leak detection for CO2 refrigeration systems using advanced infrared sensor technology. Engineered for professional HVAC\/R technicians working with transcritical CO2 systems, supermarket refrigeration, and commercial applications.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInfrared sensor technology\u003c\/strong\u003e — Highly sensitive detection specifically calibrated for CO2 refrigerant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual and audible alerts\u003c\/strong\u003e — Multi-level LED indicators and adjustable audio alarm for leak identification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible gooseneck probe\u003c\/strong\u003e — 400mm (16\") probe reaches confined spaces and difficult access points\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable sensitivity\u003c\/strong\u003e — Fine-tune detection threshold for various leak sizes and environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic zeroing\u003c\/strong\u003e — Self-calibrates to ambient conditions for accurate readings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRechargeable battery\u003c\/strong\u003e — Long-life lithium-ion battery with charging indicator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable construction\u003c\/strong\u003e — Robust housing designed for workshop and field use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDetection method: Infrared sensor\u003c\/li\u003e\n\u003cli\u003eTarget refrigerant: CO2 (R-744)\u003c\/li\u003e\n\u003cli\u003eSensitivity: Detects leaks down to 3g\/year\u003c\/li\u003e\n\u003cli\u003eProbe length: 400mm (16\")\u003c\/li\u003e\n\u003cli\u003eResponse time: \u0026lt;1 second\u003c\/li\u003e\n\u003cli\u003eBattery: Rechargeable lithium-ion\u003c\/li\u003e\n\u003cli\u003eOperating time: Up to 8 hours continuous use\u003c\/li\u003e\n\u003cli\u003eWarm-up time: \u0026lt;30 seconds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eEssential for technicians servicing transcritical CO2 refrigeration systems in supermarkets, cold storage facilities, industrial refrigeration, and commercial HVAC installations. The infrared technology eliminates false positives from other gases, ensuring reliable CO2-specific detection.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e55745-BL CO2 Infrared Leak Detector\u003c\/li\u003e\n\u003cli\u003eFlexible gooseneck probe (400mm)\u003c\/li\u003e\n\u003cli\u003eRechargeable battery\u003c\/li\u003e\n\u003cli\u003eAC adapter\/charger\u003c\/li\u003e\n\u003cli\u003eProtective carrying case\u003c\/li\u003e\n\u003cli\u003eUser manual\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164100895097,"sku":"55745-BL","price":783.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/55745-web.jpg?v=1777442853"},{"product_id":"33103-mrg","title":"Mastercool 33103-MRG 2-Way Brass Manifold Gauge Set 63mm 4 Scales with Protectors","description":"\u003ch1\u003eMastercool 33103-MRG 2-Way Brass Manifold – Piston Valves – 63mm Gauges with Protectors\u003c\/h1\u003e\u003cp\u003eMastercool is the leading manufacturer of professional quality A\/C manifold gauge sets. Our manifold gauge sets are constructed of the finest materials and machined with precision to the highest quality standards. At Mastercool, every manifold we build is built to last.\u003c\/p\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Floating Piston Valve\u003c\/strong\u003e – Results in less wear and tear in comparison to market standard twisting piston valves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble O-Ring\u003c\/strong\u003e – Allows for a much better seal resulting in fewer leaks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e63mm Gauges\u003c\/strong\u003e – 1.6 gauge class for accurate readings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 Refrigerant Scales\u003c\/strong\u003e – Multi-refrigerant compatibility on a single gauge face\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge Protectors (GP)\u003c\/strong\u003e – Shock-resistant protective covers included to safeguard gauges from damage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour Coordinated\u003c\/strong\u003e – All Mastercool gauges are colour coordinated for easy refrigerant recognition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar\/°C Metric Scales\u003c\/strong\u003e – European standard measurements (gauge p\/n MRH-MRL)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 x 1\/4\" SAE Fittings\u003c\/strong\u003e – Standard connections for hoses and service equipment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eModel: 33103-MRG\u003c\/li\u003e\n\u003cli\u003eGauge size: 63mm\u003c\/li\u003e\n\u003cli\u003eGauge class: 1.6\u003c\/li\u003e\n\u003cli\u003eScale type: Bar\/°C with 4 refrigerant scales\u003c\/li\u003e\n\u003cli\u003eRefrigerants: R134a, R22, R12, R404A\u003c\/li\u003e\n\u003cli\u003eGauge part numbers: MRH-MRL\u003c\/li\u003e\n\u003cli\u003eConnections: 3 x 1\/4\" SAE fittings\u003c\/li\u003e\n\u003cli\u003eValve type: Free floating piston valves\u003c\/li\u003e\n\u003cli\u003eMaterial: Brass\u003c\/li\u003e\n\u003cli\u003eIncludes: Shock-resistant gauge protectors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eGauge Protectors:\u003c\/h2\u003e\u003cp\u003eThe GP (Gauge Protector) designation indicates this manifold comes with shock-resistant protective covers for both gauges. These protectors shield the gauge faces from impacts, drops, and rough handling during transport and field use, significantly extending the life of your investment.\u003c\/p\u003e\u003ch2\u003eMulti-Refrigerant Capability:\u003c\/h2\u003e\u003cp\u003eThe 4-scale gauge face allows technicians to work with multiple refrigerant types using a single manifold. This manifold is calibrated for R134a, R22, R12, and R404A, covering both legacy and modern refrigerants commonly found in automotive and commercial refrigeration systems.\u003c\/p\u003e\u003ch2\u003eSafety Instructions:\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003e⚠️ WARNING:\u003c\/strong\u003e Wear safety goggles. Avoid contact with refrigerant.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNOTE (R744):\u003c\/strong\u003e CO2 systems work under extremely high pressures. Only professional technicians are recommended to service these systems. Please use proper safety equipment while servicing.\u003c\/p\u003e\u003ch2\u003ePre-Service Instructions:\u003c\/h2\u003e\u003col\u003e\n\u003cli\u003eClose both valves on the manifold gauge set by turning the high and low knobs clockwise.\u003c\/li\u003e\n\u003cli\u003eThe gauges are correctly calibrated at the factory before shipment. If calibration is required, remove the lens and insert a straight blade screwdriver into the adjusting screw on the gauge face (except liquid filled gauges).\u003c\/li\u003e\n\u003cli\u003eConnect the (red) hose to the high port and the (blue) hose to the low port on the manifold gauge.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch2\u003eTesting and Charging:\u003c\/h2\u003e\u003cp\u003eTo properly diagnose the problem in the R\/AC system, first check the system's overall performance. This includes monitoring the system's pressure as well as leak testing. Your manifold gauge set will give accurate readings of your system's pressure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e Be sure that the hand valves on the manifold gauge set are in the closed position. Always wear gloves and safety goggles when working with refrigerant.\u003c\/p\u003e\u003col\u003e\n\u003cli\u003eRemove the protective caps from the system ports. Check for leaks at the ports.\u003c\/li\u003e\n\u003cli\u003eConnect the low side service hose (blue) to the suction side of the compressor. Connect the high side service hose (red) to the discharge side of the compressor.\u003c\/li\u003e\n\u003cli\u003eIf using adapters, make sure that they are fully tightened and piercing the access valve. Failure to properly access the valve core will prohibit refrigerant flow.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch2\u003eImportant Notes:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eA system that has been opened or one that is found to be excessively low on refrigerant pressure as a result of a leak, must be fully evacuated by means of recovery and deep vacuum. \u003cstrong\u003eNOTE:\u003c\/strong\u003e Send recovered refrigerant for reclamation.\u003c\/li\u003e\n\u003cli\u003eA system that has been evacuated must be repaired, leak tested and evacuated to a required level of vacuum.\u003c\/li\u003e\n\u003cli\u003eIf charging on the liquid or high side, use only the high side valve on the manifold gauge set. Make sure the low side valve is closed.\u003c\/li\u003e\n\u003cli\u003eAfter charging, test the system by turning it on and running the A\/C with both valves closed on the manifold.\u003c\/li\u003e\n\u003cli\u003eAfter testing, disconnect the hoses from the system and make sure to use a recovery\/recycling machine to evacuate any refrigerant remaining in the hoses or manifold.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eOptional Accessories:\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eAdd \"-T\" suffix for teflon gaskets\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eReplacement Parts:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e85215: O-Rings (4 pcs)\u003c\/li\u003e\n\u003cli\u003e85216: Seal and Seat Assembly (2 pcs)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackaging:\u003c\/h2\u003e\u003cp\u003ePackaged in a clamshell. For plastic carrying case, order part number 58102-PBR separately.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The image shown may differ from the actual supplied product. Please check the model number, specifications, and description to confirm the exact gauge size, refrigerant scales, and configuration.\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164121866617,"sku":"33103-MRG","price":58.75,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/33103-E_web_cb4008d2-adb4-4d10-9fca-9b8b5ad150d5.jpg?v=1777443482"},{"product_id":"84834-co2","title":"Mastercool 84834-CO2 R744 CO2 High Side Service Coupler 1\/4\" SAE","description":"\u003cp\u003eThe \u003cstrong\u003eMastercool 84834-CO2\u003c\/strong\u003e is a professional high side service coupler specially designed for R744 (CO2) refrigerant systems. Engineered to meet SAE specifications with premium brass construction and reliable self-locking design for safe, precise refrigerant handling.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSAE J639 compliant\u003c\/strong\u003e — Meets industry standards for refrigerant containment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable self-locking construction\u003c\/strong\u003e — Secure connection during service\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable opening\u003c\/strong\u003e — Provides precise filling control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh pressure resistance\u003c\/strong\u003e — Burst pressure ≥8,700 psi (60 MPa)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy disconnect\u003c\/strong\u003e — Automatic pressure relief for safe removal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasily adjustable knobs\u003c\/strong\u003e — Simple open and close operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium brass construction\u003c\/strong\u003e — C3771BD brass with bright nickel plating\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerant:\u003c\/strong\u003e R744 (CO2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e 1\/4\" SAE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure side:\u003c\/strong\u003e High side\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBurst pressure:\u003c\/strong\u003e ≥8,700 psi (60 MPa)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e C3771BD brass with bright nickel plating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (H × W):\u003c\/strong\u003e 75mm × 40mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.65kg (1 lb 7 oz combined with low side)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Red (high side)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eEssential for servicing commercial refrigeration systems using R744 (CO2) refrigerant, including supermarket refrigeration, industrial cooling systems, and modern eco-friendly HVAC applications.\u003c\/p\u003e\u003ch3\u003eRelated Products\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-84934-co2\" title=\"Low side coupler\"\u003e84934-CO2\u003c\/a\u003e — R744 CO2 low side service coupler, 1\/4\" SAE\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55102-a\" title=\"CO2 manifold\"\u003e55102-A\u003c\/a\u003e — R744 CO2 2-valve piston manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mastercool-55661-a\" title=\"CO2 manifold\"\u003e55661-A\u003c\/a\u003e — R744 CO2 2-valve piston manifold\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eView our complete range of \u003ca href=\"\/collections\/hoses-couplers\"\u003ehoses and couplers\u003c\/a\u003e for professional HVAC\/R service solutions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eProfessional R744 CO2 service coupler for commercial refrigeration technicians requiring SAE-compliant, high-pressure rated equipment.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164648612217,"sku":"84834-CO2","price":257.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/84834-CO2-web.jpg?v=1777446333"},{"product_id":"84934-co2","title":"Mastercool 84934-CO2 R744 CO2 Low Side Service Coupler 1\/4\" SAE","description":"\u003cp\u003eThe \u003cstrong\u003eMastercool 84934-CO2\u003c\/strong\u003e is a professional low side service coupler specially designed for R744 (CO2) refrigerant systems. Engineered to meet SAE specifications with premium brass construction and reliable self-locking design for safe, precise refrigerant handling.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSAE J639 compliant\u003c\/strong\u003e — Meets industry standards for refrigerant containment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable self-locking construction\u003c\/strong\u003e — Secure connection during service\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable opening\u003c\/strong\u003e — Provides precise filling control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh pressure resistance\u003c\/strong\u003e — Burst pressure ≥8,700 psi (60 MPa)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy disconnect\u003c\/strong\u003e — Automatic pressure relief for safe removal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasily adjustable knobs\u003c\/strong\u003e — Simple open and close operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium brass construction\u003c\/strong\u003e — C3771BD brass with bright nickel plating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerant:\u003c\/strong\u003e R744 (CO2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e 1\/4\" SAE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure side:\u003c\/strong\u003e Low side\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBurst pressure:\u003c\/strong\u003e ≥8,700 psi (60 MPa)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e C3771BD brass with bright nickel plating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (H × W):\u003c\/strong\u003e 80mm × 40mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.65kg (1 lb 7 oz combined with high side)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Blue (low side)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eEssential for servicing commercial refrigeration systems using R744 (CO2) refrigerant, including supermarket refrigeration, industrial cooling systems, and modern eco-friendly HVAC applications.\u003c\/p\u003e\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca title=\"High side coupler\" href=\"\/products\/mastercool-84834-co2\"\u003e84834-CO2\u003c\/a\u003e — R744 CO2 high side service coupler, 1\/4\" SAE\u003c\/li\u003e\n\u003cli\u003e\n\u003ca title=\"CO2 manifold\" href=\"\/products\/mastercool-55102-a\"\u003e55102-A\u003c\/a\u003e — R744 CO2 2-valve piston manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003ca title=\"CO2 manifold\" href=\"\/products\/mastercool-55661-a\"\u003e55661-A\u003c\/a\u003e — R744 CO2 2-valve piston manifold\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eView our complete range of \u003ca href=\"\/collections\/hoses-couplers\"\u003ehoses and couplers\u003c\/a\u003e for professional HVAC\/R service solutions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProfessional R744 CO2 service coupler for commercial refrigeration technicians requiring SAE-compliant, high-pressure rated equipment.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164650676601,"sku":"84934-CO2","price":257.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/84934-CO2-web.jpg?v=1777446343"},{"product_id":"mastercool-53003-200-nitrogen-regulator-co2-systems-uk-bs3-200-bar","title":"Mastercool 53003-200 Nitrogen Regulator CO2 Systems UK BS3 200 Bar","description":"\u003ch3\u003eProfessional Nitrogen Pressure Regulator for CO2 System Testing - UK BS3 Standard\u003c\/h3\u003e\u003cp\u003eHigh-pressure nitrogen regulator specifically designed for pressure testing CO2 refrigeration systems. Features UK BS3 cylinder connection and delivers up to 200 bar outlet pressure for comprehensive system leak detection and integrity testing.\u003c\/p\u003e\u003ch4\u003eKey Features:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh outlet pressure\u003c\/strong\u003e - Up to 200 bar for rigorous CO2 system testing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUK BS3 inlet connection\u003c\/strong\u003e - Standard UK nitrogen cylinder fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCO2 system specialist\u003c\/strong\u003e - Engineered for high-pressure CO2 refrigeration applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual pressure gauges\u003c\/strong\u003e - Monitor both inlet (up to 300 bar) and outlet (up to 200 bar) pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4\" SAE flare outlet\u003c\/strong\u003e - Standard connection for HVAC\/R equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision control\u003c\/strong\u003e - Fine adjustment for accurate test pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional-grade construction\u003c\/strong\u003e - Built for commercial refrigeration technicians\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eApplications:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCO2 refrigeration system pressure testing and leak detection\u003c\/li\u003e\n\u003cli\u003eTranscritical CO2 system commissioning\u003c\/li\u003e\n\u003cli\u003eCommercial refrigeration installations (supermarkets, cold storage)\u003c\/li\u003e\n\u003cli\u003eNatural refrigerant system integrity verification\u003c\/li\u003e\n\u003cli\u003eHigh-pressure leak testing before CO2 charging\u003c\/li\u003e\n\u003cli\u003eSystem repairs and maintenance verification\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet pressure:\u003c\/strong\u003e Up to 300 bar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet pressure:\u003c\/strong\u003e Up to 200 bar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet connection:\u003c\/strong\u003e BS3 (UK nitrogen cylinder standard)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet connection:\u003c\/strong\u003e 1\/4\" Male Flare SAE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge range:\u003c\/strong\u003e High-pressure rated for CO2 applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 53003-200\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e CO2 refrigeration system testing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhy Nitrogen Testing for CO2 Systems?\u003c\/h4\u003e\u003cp\u003eCO2 refrigeration systems operate at significantly higher pressures than traditional HFC systems (up to 120 bar operating pressure). Nitrogen pressure testing at 200 bar ensures:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eComplete leak detection before expensive CO2 charging\u003c\/li\u003e\n\u003cli\u003eSystem integrity verification at pressures exceeding operating conditions\u003c\/li\u003e\n\u003cli\u003eCompliance with safety standards for high-pressure refrigeration\u003c\/li\u003e\n\u003cli\u003ePrevention of moisture contamination during testing\u003c\/li\u003e\n\u003cli\u003eCost-effective testing compared to using CO2 refrigerant\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCO2 Refrigeration Systems:\u003c\/h4\u003e\u003cp\u003eCO2 (R744) is increasingly used in commercial refrigeration due to its low environmental impact and excellent thermodynamic properties. However, CO2 systems require specialised high-pressure equipment and testing procedures. This regulator is specifically designed for the demanding requirements of CO2 system commissioning.\u003c\/p\u003e\u003ch4\u003eUK F-Gas Compliance:\u003c\/h4\u003e\u003cp\u003eProper pressure testing with nitrogen is mandatory under UK F-Gas regulations before charging any refrigeration system. For CO2 systems, the higher test pressures ensure system safety and regulatory compliance.\u003c\/p\u003e\u003ch4\u003eRelated Products:\u003c\/h4\u003e\u003cp\u003eComplete your CO2 system toolkit with our \u003ca href=\"\/collections\/manifolds-gauges\"\u003ehigh-pressure CO2 manifold gauges\u003c\/a\u003e, \u003ca href=\"\/collections\/vacuum-pumps\"\u003evacuum pumps\u003c\/a\u003e, \u003ca href=\"\/collections\/diagnostic-testing-tools\"\u003eleak detectors\u003c\/a\u003e, and \u003ca href=\"\/collections\/recovery-charging-equipment\"\u003erecovery equipment\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eEssential equipment for commercial refrigeration technicians working with CO2 transcritical systems.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57165707968889,"sku":"53003-200","price":222.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/53003-200-1.jpg?v=1777450133"},{"product_id":"mastercool-53007-100-co2-co2-pressure-regulator-w21-8-100-bar","title":"Mastercool 53007-100-CO2 CO2 Pressure Regulator W21.8 100 Bar","description":"\u003ch3\u003eProfessional CO2 Pressure Regulator - Standard W21.8 Connection\u003c\/h3\u003e\u003cp\u003eHigh-quality CO2 pressure regulator designed for professional refrigeration applications using CO2 (R744) refrigerant. Features standard W21.8 x 1\/14\" RH inlet connection and delivers up to 100 bar outlet pressure for CO2 system charging and servicing.\u003c\/p\u003e\u003ch4\u003eKey Features:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 bar outlet pressure\u003c\/strong\u003e - Suitable for CO2 refrigeration system charging and operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard W21.8 connection\u003c\/strong\u003e - Universal CO2 cylinder fitting (W21.8 x 1\/14\" RH)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCO2 refrigerant specialist\u003c\/strong\u003e - Engineered specifically for R744 applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual pressure gauges\u003c\/strong\u003e - Monitor both inlet (up to 300 bar) and outlet (up to 100 bar) pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4\" SAE flare outlet\u003c\/strong\u003e - Standard connection for HVAC\/R equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision control valve\u003c\/strong\u003e - Fine adjustment for accurate charging pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional-grade construction\u003c\/strong\u003e - Built for commercial refrigeration technicians\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass body construction\u003c\/strong\u003e - Durable and corrosion-resistant\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eApplications:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCO2 refrigeration system charging and recharging\u003c\/li\u003e\n\u003cli\u003eTranscritical CO2 system servicing\u003c\/li\u003e\n\u003cli\u003eCommercial refrigeration maintenance (supermarkets, cold storage)\u003c\/li\u003e\n\u003cli\u003eNatural refrigerant system repairs\u003c\/li\u003e\n\u003cli\u003eCO2 refrigerant recovery and transfer\u003c\/li\u003e\n\u003cli\u003eHeat pump CO2 system servicing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet pressure:\u003c\/strong\u003e Up to 300 bar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet pressure:\u003c\/strong\u003e Up to 100 bar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet connection:\u003c\/strong\u003e Standard W21.8 x 1\/14\" RH (right-hand thread)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet connection:\u003c\/strong\u003e 1\/4\" Male Flare SAE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge range:\u003c\/strong\u003e High-pressure rated for CO2 applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 53007-100-CO2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e CO2 refrigerant charging and servicing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody material:\u003c\/strong\u003e Brass with protective coating\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhy CO2 (R744) Refrigeration?\u003c\/h4\u003e\u003cp\u003eCO2 is increasingly adopted in commercial refrigeration due to:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eZero ozone depletion potential (ODP) and low global warming potential (GWP)\u003c\/li\u003e\n\u003cli\u003eExcellent thermodynamic properties for refrigeration\u003c\/li\u003e\n\u003cli\u003eNatural, non-toxic, and non-flammable refrigerant\u003c\/li\u003e\n\u003cli\u003eCost-effective and widely available\u003c\/li\u003e\n\u003cli\u003eCompliance with F-Gas regulations and environmental legislation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCO2 System Considerations:\u003c\/h4\u003e\u003cp\u003eCO2 refrigeration systems operate at significantly higher pressures than traditional HFC systems. This regulator is specifically designed to handle:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh operating pressures (up to 100 bar outlet)\u003c\/li\u003e\n\u003cli\u003eTranscritical operation where CO2 exceeds its critical point\u003c\/li\u003e\n\u003cli\u003eSafe charging procedures for high-pressure systems\u003c\/li\u003e\n\u003cli\u003ePrecise pressure control for optimal system performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eUK F-Gas Compliance:\u003c\/h4\u003e\u003cp\u003eCO2 (R744) is classified as a natural refrigerant and is exempt from many F-Gas restrictions. However, proper handling equipment and F-Gas certification are still required for working with refrigeration systems. This regulator meets professional standards for CO2 system servicing.\u003c\/p\u003e\u003ch4\u003eRelated Products:\u003c\/h4\u003e\u003cp\u003eComplete your CO2 system toolkit with our \u003ca href=\"\/collections\/manifolds-gauges\"\u003ehigh-pressure CO2 manifold gauges\u003c\/a\u003e, \u003ca href=\"\/collections\/recovery-charging-equipment\"\u003erecovery equipment\u003c\/a\u003e, \u003ca href=\"\/collections\/diagnostic-testing-tools\"\u003enitrogen testing regulators\u003c\/a\u003e, and \u003ca href=\"\/collections\/vacuum-pumps\"\u003evacuum pumps\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eEssential equipment for commercial refrigeration technicians working with CO2 transcritical and subcritical systems.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57165708689785,"sku":"53007-100-CO2","price":181.94,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/53007-100-CO2-1.jpg?v=1777450144"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/collections\/55661-A-web_b5211188-1c0f-4494-9891-53019866c2e2.jpg?v=1781064589","url":"https:\/\/www.airconspares.com\/collections\/mastercool-co2-r744-tools.oembed","provider":"Airconspares.com","version":"1.0","type":"link"}