Mastercool 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.
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Mastercool 84934-CO2 R744 CO2 Low Side Service Coupler 1/4" SAE 
Mastercool 84934-CO2 R744 CO2 Low Side Service Coupler 1/4" SAE
Mastercool 84934-CO2 R744 CO2 Low Side Service Coupler 1/4" SAE
£257.79Sale price £257.79 Regular price -
Mastercool 84834-CO2 R744 CO2 High Side Service Coupler 1/4" SAE 
Mastercool 84834-CO2 R744 CO2 High Side Service Coupler 1/4" SAE
Mastercool 84834-CO2 R744 CO2 High Side Service Coupler 1/4" SAE
£257.79Sale price £257.79 Regular price -
Mastercool 55661-A R744 CO₂ Aluminium Manifold Gauge Set 2-Way 70mm 3×150cm 
Mastercool 55661-A R744 CO₂ Aluminium Manifold Gauge Set 2-Way 70mm 3×150cm
Mastercool 55661-A R744 CO₂ Aluminium Manifold Gauge Set 2-Way 70mm 3×150cm
£420.06Sale price £420.06 Regular price -
Mastercool 55103-A R744 CO₂ 2-Valve Piston Manifold Body 70mm 1/4" SAE 
Mastercool 55103-A R744 CO₂ 2-Valve Piston Manifold Body 70mm 1/4" SAE
Mastercool 55103-A R744 CO₂ 2-Valve Piston Manifold Body 70mm 1/4" SAE
£247.90Sale price £247.90 Regular price -
Mastercool 55102-A R744 CO₂ Aluminium Manifold Body 70mm 1/4" SAE 
Mastercool 55102-A R744 CO₂ Aluminium Manifold Body 70mm 1/4" SAE
Mastercool 55102-A R744 CO₂ Aluminium Manifold Body 70mm 1/4" SAE
£151.50Sale price £151.50 Regular price -
Mastercool 55102-2400 R744 CO₂ High Pressure Replacement Gauge 70mm Oil Filled 
Mastercool 55102-2400 R744 CO₂ High Pressure Replacement Gauge 70mm Oil Filled
Mastercool 55102-2400 R744 CO₂ High Pressure Replacement Gauge 70mm Oil Filled
£70.24Sale price £70.24 Regular price -
Mastercool 55102-1400 R744 CO₂ Low Pressure Replacement Gauge 70mm Oil Filled 
Mastercool 55102-1400 R744 CO₂ Low Pressure Replacement Gauge 70mm Oil Filled
Mastercool 55102-1400 R744 CO₂ Low Pressure Replacement Gauge 70mm Oil Filled
£70.24Sale price £70.24 Regular price -
Mastercool 33103-MRG 2-Way Brass Manifold Gauge Set 63mm 4 Scales with Protectors 
Mastercool 33103-MRG 2-Way Brass Manifold Gauge Set 63mm 4 Scales with Protectors
Mastercool 33103-MRG 2-Way Brass Manifold Gauge Set 63mm 4 Scales with Protectors
£58.75Sale price £58.75 Regular price -
2 Valve Transcritical CO2 manifold 
2 Valve Transcritical CO2 manifold
2 Valve Transcritical CO2 manifold
£1,082.84Sale price £1,082.84 Regular price -
Mastercool 53003-200 Nitrogen Regulator CO2 Systems UK BS3 200 Bar 
Mastercool 53003-200 Nitrogen Regulator CO2 Systems UK BS3 200 Bar
Mastercool 53003-200 Nitrogen Regulator CO2 Systems UK BS3 200 Bar
£222.80Sale price £222.80 Regular price -
Mastercool 53007-100-CO2 CO2 Pressure Regulator W21.8 100 Bar 
Mastercool 53007-100-CO2 CO2 Pressure Regulator W21.8 100 Bar
Mastercool 53007-100-CO2 CO2 Pressure Regulator W21.8 100 Bar
£181.94Sale price £181.94 Regular price -
Mastercool 55745-BL CO2 Infrared Leak Detector 
Mastercool 55745-BL CO2 Infrared Leak Detector
Mastercool 55745-BL CO2 Infrared Leak Detector
£783.00Sale price £783.00 Regular price
Frequently asked questions
Yes. We supply professional HVAC engineers, refrigeration contractors, air conditioning installers, and facilities management companies across the UK. Trade accounts are available with preferential pricing and volume discounts.
We stock leading HVAC brands including Aspen Pumps, Sauermann, Blue Diamond, Javac, Mastercool, Armacell, K-Flex, Diversitech, and many more. All products are genuine OEM or manufacturer-approved.
Yes. Orders placed before 1PM on in-stock items are dispatched same day. We offer tracked delivery options across the UK.
Yes. Our trade team is available Monday to Friday 8AM to 4PM on 0161 775 1190 or at sales@airconspares.com. We can advise on product selection, compatibility, and specifications.