Hot and Cold Water Cross Feed with Showerforce 100T shower

[jimyoung]

Have just installed a showerforce 1000T power shower but find that the cold water supply from the tank is bleeding into the hot water supply. The result is that I now have to wait 45 seconds or longer before any hot water comes out of the hot water taps - Anyone know how to fix this or should I just give up and install an electric shower.

 

[breezer]

I am not a plumber or heating engineer but how about fitting a pressure reducing valve

 

[mikeh]

Have just installed a showerforce 1000T power shower but find that the cold water supply from the tank is bleeding into the hot water supply. The result is that I now have to wait 45 seconds or longer before any hot water comes out of the hot water taps - Anyone know how to fix this or should I just give up and install an electric shower.

Try putting an in-line 'check valve' (one way non return valve) in both the hot and cold "out" feeds from the water pump to prevent any cross flow (Like 'Screwfix' {www.screwfix.co.uk} part # 14173 or 19860)

 

[masona]

I can't see how as it should be equal pressure.Can you not open the hot side first then cold afterward ? Maybe your hot water supply got a longer run to reach to the mixer than the cold supply.

 

[masona]

Thinking about it,are you sure the cold feed is coming from the tank storage and not from the water mains.