Cold taps suddenly lose pressure, but tank in loft is full...

[Mikeyboy]

This morning, whilst my daughter was showering, the cold seemed to lose power, and effect the amopunt of water coming through the rose. I checked the other cold taps in the room, and the water was at a much lower pressure than usual. They are fed from the cold water tank in the loft, which is full of water. I imagine that the pipe from this tank is maybe partly blocked by something solid from this tank - maybe cacium based? Any ideas on how I might solve this problem?

[The Natural Philosopher]

Possibly rotting bird based actually.

[jim]

shower and cold taps in room not actually fed from said tank, but from mains which is reduced pressure as is dug up down road due to a leak?

the setup you describe would enable a night-time glass of water to be somewhat "unfresh" having been stored in roof for ? days...

[Mikeyboy]

No those taps/shower are definitely fed from the tank in the loft. No birds either as the tank is fully covered!

[jim]

what's the tank made of? do you have hard water? jim

[Reentrant]

If it's a blockage then try the same way as you'd fix an airlock - garden hose connected to mains pressure one end and other end held tight against open cold bath tap. Might be worth part-emptying the loft tank first or checking the overflow can cope.

[George (dicegeorge)]

in my house the kitchen tap and a few others come direct from the water mains, others come from a big water tank, and the hot water comes from a third tank.

i suggest jim experiments with various stop taps, perhaps wiring a float up and off, to find where the shower water comes from...

[Mikeyboy]

1 Thanks George, but I know where the shower water comes from, it was only fitted last year! It is fed from the loft tank- as I have already said. 2 Jim, the tank is made of galvanised metal. We live in London - hard water. 3 Thanks, Reentrant, that would be quite difficult, but if its the only answer, I'll just have to bite the bullet! Any more thoughts out there?? Mike

[dennis]

Modern shower mixer frequently have screen filters in them. You need to check them if the flow is poor.

On the Mira I fitted you take off the front and unscrew the filter elements using the tool supplied. YMMV.