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The John Guest Keg Gas Inlet Adaptor PI561214CS-NRV is a brass screw-on fitting designed to connect 3/8" OD gas pipe to the gas inlet of a compatible keg coupler. Featuring an integrated non-return valve (NRV), the fitting helps prevent product or pressure from flowing back into the gas supply line.
Commonly used with CO2, mixed gas and nitrogen draught dispense systems, this John Guest fitting combines a 3/8" push-fit connection with a 1/2" BSPT threaded connection for compatible keg couplers.
The built-in non-return valve allows gas to flow towards the keg while helping prevent reverse flow back through the gas line.
This is an important difference between a dedicated keg coupler gas inlet fitting and a standard product outlet fitting.
Commonly used with compatible:
The 1/2" BSPT threaded connection screws onto the compatible gas inlet of the keg coupler, while the 3/8" push-fit connection accepts compatible beverage gas pipe.
Ensure the pipe is cut cleanly and square before inserting it fully into the push-fit connection.
Always check the thread type and size of your keg coupler before ordering, as connections can vary between manufacturers and models.