John Guest 12mm Push Fit Non-Return Valve

John Guest 12mm Push Fit Non-Return Valve

This John Guest Non-Return fitting uses the push fit pipe connector system to accept semi-rigid 12mm water pipes.

These are compatible with both hot and cold water systems and are compliant with drinking water.

It is recommended that you use the John Guest 12mm Pipe Inserts with these fittings to ensure that the pipe can't work loose over time.