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Cold water suply filling up header tank in loft thru hot water suply on shower.

Have just installed a new power shower with shower pump, A trevi 45 twin pump. Now have this problem with the cold water suply filling up the header tank in the loft thru the hot water suply pushing all the hot water thru the tank into the header tank in the loft out the over flow into the road. This only hapens when the shower is not switched on. Can you help please is it the pump or the mixer tap on the shower at fault.

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  • Anonymous Mar 14, 2014

    Shower mixer knob turns back towards cold by itself.

  • Anonymous Mar 22, 2014

    Shower runs cold, no hot water coming through although tanks and taps give hot in same and other rooms?

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Hi did you run a seperate cold water supply from the storage tank to the shower pump & also a seperate hot supply from the hot water cylinder, it sounds as though the cold water is crossing into the hot service & pushing its way up to the tank as its the only way it can go, sounds as though the cold water connection to the shower is not tank fed & possibly directly off the water main.?

Posted on Dec 15, 2008

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I have a combination hot water tank with thermostate, with the cold water header tank attached. If i place this in the loft will i be able to run a shower off of it.

Posted on Oct 12, 2009

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