John Guest Non-return Valve
A John Guest non-return valve is the best insurance you can buy for your expensive regulator. The non-return valve protects your gas regulator by preventing beer from being forced back into the regulator if you have not adjusted your pressures correctly. We get plenty of customers with ruined regulators due to beer coming back up the gas line from the keg. The non-return valve will only let gas flow out of the regulator and prevent anything coming back in. Worth every cent!