Gravity Fed Cold Water Pressure

[osirion]

Hi

Hope some Plumber or DIYer can help on this one

We have a gravity fed cold water supply to our bathroom, and have had a little work done on our hot water and mains water supply in our kitchen recently.

Unfortunately since this work the Gravity fed cold water pressure keeps going up and down, so much so that our shower can only provide a small flow of hot water constantly as the cold pressure comes in and out.

Also our toilet cistern only fills very very slowly.

any ideas what could cause this, could it be that the Cold water tank is not filling sufficiently from the mains, or that the flow downward to our taps etc is blocked.

cant afford to call a plumber out and cant find anything like this on a google search so any ideas very welcome.

as an aside could i get rid of the cold water tank by conecting the mains inlet directly to the tank outlet, and if so would I have to put a flow regulator of some description in to reduce the cold pressure?

Cheers for all this

Osirion

[lembo121]

hi Osirion, You might find that the mains water stop **** hasn't been fully opened after you had your work done. Do you have an electric shower or is it a mixer shower? This information would help to answer your question better.

[raysparx]

certainly sounds like stop-tap not opened enough as lembo says, turn it anti clockwise till it won't turn any more then turn it back a little and then check pressure, if it is then too strong close the tap slightly.

Good luck. Ray

[stanleyman]

I suggest you get the person who did the recent work back to sort it out. You can't connect direct to the mains without changing to an unvented cylinder with all the safety devices and designed to take a higher pressure of about three bar which may also need a pressure reducing valve if the mains is higher that three bar.

[osirion]

Thanks for the replys

erm.. Funny you should say that re the mains stopcock because i tried that yesterday, and it wasn't fully open by any means. so did open it fully then, but it hasnt made any difererence.

Its a mixer shower and what looks like a diaphram valve on the toilet cistern.

I have allready discussed the work with the people who were working on the kitchen and they say that they cant think of any reason that what they have done has caused this.

following the advice of Stanleyman it looks like I wont be changing to a full mains system for a while yet.

anyway thanks to the posters, anyone got any more ideas??

Osirion