John Guest 8 mm Check Valve

John Guest check valve for 8mm LLDPE tubing.  The cracking pressure is about 0.02 bar. Use these to prevent beer flowing back into your CO2 system due to unintended pressure differentials.

Note, do not freeze these fittings, the lowest working temperature is 1C.

Working pressures and temperatures

• 10 Bar at 20C
• 7 Bar at 65C intermittent hot water
• Minimum Temperature 1C
• Typical ‘crack open’ pressure 0.02 Bar