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Thanks to all who helped on this especially bab. The result was that two days after i fitted the NRV to the cold, it solved the problem. Why after two days i have no idea. But all the draw off's (sink, bath and toilet) no longer trigger the pump. Cheers

Hi bab, Thanks for your input i belive you have got it on the nail and i understand. Before i have to rip half the house apart to chase the wire to put a switch in do you thing a double check NRV (as you have suggested) would make any difference at all. seperate feed is to big a job and if...

Hi Softus, Do you actaully think thats going to make a difference?. Its only that i cant see the pressure dropping from the hot supply if its only the cold that's causing the problem. Hot comes from the hot tank and cold from the header tank. If its going to make a difference i'll do it :?:

Fitted non return valve to cold water feed to pump. Convinced this was going to work but it didnt in fact made no difference. Its got be baffelled. Why would pump want to try and work when taps in bath and sink are not linked to pump at all. And now with non return valve the pump should not...

Thanks guys, am going to try the non return valve as thats the easiest to do. The switch is next on the list although this is going to be difficult to re route the wire to switch due to location of power supply. WIll let you know what happens. Can't see any way of adjusting the strengh of the...

I fitted a power shower some 3 years ago with a separate pump. The out put goes to the shower only. When we use the cold water(only) in the bath or sink the pump tries to switch itself on but in surges. At times it freezes completely as if the motor is going to seize up. It works perfectly well...