Clear non-return valve manufactured in polypropylene with 19 / 23mm universal compression connections. Prevents backflow in overflow pipes. Valve opens with the weight of the liquid, allowing it to flow through and then closes once the liquid has passed....

50mm polypropylene tundish with 19/23mm pipe outlet. Can be installed on overflow pipes to provide an air-gap and a visual warning of the flow of water through the overflow pipe system.

Incorporates a self-closing membrane which opens to allow discharge to flow freely and then closes to form a seal. Membrane seal creates no resistance, ensuring smooth discharge flow from the PRV/TRV, and is spring-free, so not affected in hard water...