{"product_id":"mastercool-automotive-service-coupler-hs-r134a-man-1-4-inch-fl-m-x-16mm","title":"Mastercool 82834 — R134a High-Side Manual Coupler 1\/4\" x 16mm","description":"\u003ch2\u003eMastercool 82834 — R134a High-Side Manual Service Coupler\u003c\/h2\u003e\n\u003cp\u003eProfessional manual service coupler for R134a high-side (discharge) connections. Features 1\/4\" FL-M manifold connection and 16mm service port fitting for secure, leak-free attachment to R134a automotive and HVAC systems. Manual thumb-operated valve provides precise control over refrigerant flow. Durable brass construction ensures long service life in demanding professional environments.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eR134a High-Side:\u003c\/strong\u003e 16mm service port for discharge connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual Operation:\u003c\/strong\u003e Thumb-operated valve for precise control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4\" FL-M Connection:\u003c\/strong\u003e Standard flare male fitting for manifold hoses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16mm Service Port:\u003c\/strong\u003e High-side (red) connection for R134a systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass Construction:\u003c\/strong\u003e Durable, corrosion-resistant materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak-Free Design:\u003c\/strong\u003e Precision-machined for reliable sealing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Quality:\u003c\/strong\u003e Built for daily workshop use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Works with all R134a systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 82834\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Manual service coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide:\u003c\/strong\u003e High-side (discharge\/red)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerant:\u003c\/strong\u003e R134a\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManifold Connection:\u003c\/strong\u003e 1\/4\" FL-M (flare male)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService Port:\u003c\/strong\u003e 16mm (high-side)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual thumb valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarcode:\u003c\/strong\u003e 700376117417\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 82834\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHS Code:\u003c\/strong\u003e 84189910\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRelated Coupler Models\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eLow-Side Coupler:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-service-coupler-low-side-blue-r134a-manual-1-4-fl-m-x-13mm\"\u003e82934-E — R134a Low-Side Manual Coupler 1\/4\" x 13mm\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAlternative Connections:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/82834-3-8\"\u003e82834-3\/8 — High-Side Manual Coupler with 3\/8\" Fitting\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/82834-eu\"\u003e82834-EU — High-Side Manual Coupler with 14mm-F Connection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/82834-j\"\u003e82834-J — High-Side Manual Coupler M12 x 1.75 (Japanese\/Asian)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/82834-sl-e\"\u003e82834-SL-E — High-Side Manual Coupler with Safety Lock\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eR134a automotive A\/C service\u003c\/li\u003e\n\u003cli\u003eR134a HVAC system service\u003c\/li\u003e\n\u003cli\u003eHigh-side (discharge) connections\u003c\/li\u003e\n\u003cli\u003eManifold gauge set connections\u003c\/li\u003e\n\u003cli\u003eRefrigerant charging and recovery\u003c\/li\u003e\n\u003cli\u003eSystem diagnostics and pressure testing\u003c\/li\u003e\n\u003cli\u003eProfessional automotive and HVAC service\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Manual Couplers?\u003c\/h2\u003e\n\u003cp\u003eManual service couplers feature a thumb-operated valve that provides precise control over refrigerant flow:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eControlled Connection:\u003c\/strong\u003e Open valve gradually to prevent pressure surges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Refrigerant Loss:\u003c\/strong\u003e Close valve before disconnecting to minimise venting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety:\u003c\/strong\u003e Control refrigerant release during connection\/disconnection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Standard:\u003c\/strong\u003e Preferred by many technicians for controlled operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable:\u003c\/strong\u003e Simple mechanical design with fewer failure points\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHigh-Side vs Low-Side\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Side (82834 - This Coupler):\u003c\/strong\u003e 16mm service port, red, connects to discharge\/high-pressure side\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Side (82934-E):\u003c\/strong\u003e 13mm service port, blue, connects to suction\/low-pressure side\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eR134a Service Port Sizes\u003c\/h2\u003e\n\u003cp\u003eR134a systems use different service port sizes to prevent incorrect connections:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Side:\u003c\/strong\u003e 16mm (larger) - prevents low-side hose connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Side:\u003c\/strong\u003e 13mm (smaller) - prevents high-side hose connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis safety feature ensures technicians cannot accidentally connect hoses to the wrong side of the system.\u003c\/p\u003e\n\u003ch2\u003eBenefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual Control:\u003c\/strong\u003e Thumb valve provides precise refrigerant flow control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Venting:\u003c\/strong\u003e Close valve before disconnecting to minimise refrigerant loss\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal R134a:\u003c\/strong\u003e Works with all R134a automotive and HVAC systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Brass:\u003c\/strong\u003e Corrosion-resistant construction for long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak-Free:\u003c\/strong\u003e Precision-machined for reliable sealing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Quality:\u003c\/strong\u003e Built for daily workshop use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Connection:\u003c\/strong\u003e 1\/4\" FL-M fits all standard manifold hoses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Design:\u003c\/strong\u003e 16mm port prevents incorrect low-side connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eEnsure high-side service port (16mm, red cap) is clean\u003c\/li\u003e\n\u003cli\u003eRemove service port cap\u003c\/li\u003e\n\u003cli\u003eEnsure coupler thumb valve is closed\u003c\/li\u003e\n\u003cli\u003ePush coupler onto 16mm high-side service port\u003c\/li\u003e\n\u003cli\u003eVerify secure connection\u003c\/li\u003e\n\u003cli\u003eSlowly open thumb valve to allow refrigerant flow\u003c\/li\u003e\n\u003cli\u003ePerform service operation\u003c\/li\u003e\n\u003cli\u003eClose thumb valve before disconnecting\u003c\/li\u003e\n\u003cli\u003eRemove coupler from service port\u003c\/li\u003e\n\u003cli\u003eReplace service port cap\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003ePerfect For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAutomotive A\/C technicians\u003c\/li\u003e\n\u003cli\u003eHVAC service technicians\u003c\/li\u003e\n\u003cli\u003eR134a system service\u003c\/li\u003e\n\u003cli\u003eWorkshop environments\u003c\/li\u003e\n\u003cli\u003eMobile service operations\u003c\/li\u003e\n\u003cli\u003eFleet maintenance\u003c\/li\u003e\n\u003cli\u003eProfessional refrigerant service\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eManual vs Quick Connect Couplers\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eManual (82834 - This Coupler):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThumb-operated valve for precise control\u003c\/li\u003e\n\u003cli\u003eReduced refrigerant loss during disconnection\u003c\/li\u003e\n\u003cli\u003eSimple, reliable mechanical design\u003c\/li\u003e\n\u003cli\u003ePreferred by many professional technicians\u003c\/li\u003e\n\u003cli\u003eLower cost\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuick Connect:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFaster connection\/disconnection\u003c\/li\u003e\n\u003cli\u003eOne-handed operation\u003c\/li\u003e\n\u003cli\u003eNo valve to operate\u003c\/li\u003e\n\u003cli\u003eHigher cost\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMaintenance\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eKeep coupler clean and free from debris\u003c\/li\u003e\n\u003cli\u003eInspect O-rings regularly for wear\u003c\/li\u003e\n\u003cli\u003eReplace O-rings if leaks develop\u003c\/li\u003e\n\u003cli\u003eLubricate O-rings occasionally with refrigerant oil\u003c\/li\u003e\n\u003cli\u003eCheck thumb valve operation - should move smoothly\u003c\/li\u003e\n\u003cli\u003eStore in protective case when not in use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSafety Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAlways wear safety glasses when connecting\/disconnecting\u003c\/li\u003e\n\u003cli\u003eEnsure system pressure is safe before connecting\u003c\/li\u003e\n\u003cli\u003eClose thumb valve before disconnecting to minimise refrigerant loss\u003c\/li\u003e\n\u003cli\u003eNever force coupler onto service port\u003c\/li\u003e\n\u003cli\u003eVerify correct port size (16mm high-side)\u003c\/li\u003e\n\u003cli\u003eFollow proper refrigerant handling procedures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eProfessional Quality:\u003c\/strong\u003e Mastercool manual service couplers are built to professional standards for reliable, controlled refrigerant connections in demanding automotive and HVAC service environments. Essential accessory for R134a system service.\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164116853113,"sku":"82834","price":27.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/82834.jpg?v=1777443347","url":"https:\/\/www.airconspares.com\/products\/mastercool-automotive-service-coupler-hs-r134a-man-1-4-inch-fl-m-x-16mm","provider":"Airconspares.com","version":"1.0","type":"link"}