pressure reduction value

[rvtate]

A couple of years ago we had the loft converted and had a shower room put in up there. The header tank is right up in the apex of the roof. Unfortunately the plumber did not put in a cold water feed for the shower from the header tank when he did the first fix. When I came to install the shower all I had was low pressure hot water, mains pressure cold and the plumber was long gone. We elected to put in a pressure reduction value on the cold water feed. This sort of works although the value gets limed up every once in a while and now the shower has sprung a leak from it mixer manifold. Can anyone recomend a better solution apart from getting a cold water feed from the header tank which would be very difficult.

I have thought of taking a feed from the radiator header tank - much smaller and lower (1meter below the shower head) The shower is a pump one (Showerforce 1500-XT) so would this matter too much...?

 

[ChrisR]

Yes it would matter too much. I saw an exploded boiler where someone had done that. Constant reoxygenation of the CH water leads to dramatic rusting in all the ferrous parts of the heating!

You could ADD a cistern for the cold, but if it's small it might run out unless you make sure it gets priority and have measured all the flows.
It would of course have to be ABOVE the shower head , about the same height as the other supply cistern

 

[nstreet]

I have thought of taking a feed from the radiator header tank

Is Fernox good for the skin then?

 

[ChrisR]

Oh yes, you might poison your family. Not as important as the boiler, obviously..