Recently installed a shower with pump. Noticed problem with hot water now in the cold water storage tank. The hot water is venting up the cold water feed from the cylinder but when we turn the shower pump off it we don't seem tho have the problem. Can you help?

Many thanks Stephen

steve relfe, July 2007

no problem tony, we can't remember everything.

hi-spec plumbing, July 2007

quite right,thank you for correction,Hi Spec plumbing

tony.tsp heating, July 2007

>fit seperate non return vavle on pipework just before entering pump


you never put non return valves on pipework before entering a pump, the pump has to be able to vent.

non return valves always go on the pipework between the pump & shower, never between cylinder & pump or cws & pump.

hi-spec plumbing, July 2007

the only way hot water will be forced back up the cold feed to cylinder is if it is pushed ,this seeems to happen when you pump is on the fore pump is some how pumping cold up pipe ,firstly check instalation against instructions if ok would say non return valve on hot side on pump is faulty,or bit of solder/debre stuck in non return flap,remove pump and clean or replace pump if faulty.
if pump no good quality best cure fit seperate non return vavle on pipework just before entering pump

tony..tsp heating, July 2007

have you connected the hot to the cylinder and the cold to the mains ?

hi-spec plumbing, July 2007

you have to explain better than that you can see the problem we can't.

>The hot water is venting up the cold water feed from the cylinder

there is not a cold water feed from the cylinder, there is a cold feed to the cylinder. there is hot water feed from cylinder

also how have you connected the cold to the pump and from where ?

how is the hot taken from the cylinder ?


we can't guess.

sonray heating, July 2007