Hi all. I need some advice as im installing a new bath and thermosatic shower which has had new pipework to it. The bath works fine, no leaks etc but the shower leaks from the head when the toilet is flushed or taps are run. Its as though there is some sort of syphoning effect going on. Its not a drip either, you could almost have a shower under the leak its that bad. Talked to my old man about it and he says I may need a non return valve putting in the pipework? Is this true? Also does the pressure of the hot and cold have to be the same as my cold supply is alot higher pressure. HEEEEEEEEEELLLLLLPPP.
Chris
Chris