Cold water Chaos, help needed!

[Gingerbread Man]

dave144 said:

Everything you say is correct. The red valve head is situated under the header tank. If there was a fault in the header tank would it prevent flow to the taps etc if they have been plumbed into the low pressure side after the tank.

If the valve is on the pipework that comes out of your cold water storage tank, it'll either isolate the cold taps (low pressure) or the low pressure hot.

Can you follow the pipe? Does it go to the cylinder, therefore hot.
Or does it go straight to the bathrooms? Therefore cold.

Find the pipe in the cylinder cuboard that goes into the bottom of the cylinder, hold it while someone else bangs the pipe in the loft with something. Can you feel the vibrations?

[dave144]

Thanks for all the advice. I'm going to have to put the trouble shooting on hold now as im back at work and the little one is asleep at six...not ideal by any means.

[dave144]

finally got round to getting some pictures

the valve under the sink


no water!


This valve feeds the expansion and header tank


the tank which houses the leaking float valve


the other tank which i have not dare open yet

Still cannot get my head around it. Tried the hot water again, the boiler fired up for two minutes and then knocked off. When I went upstairs the hot water had heated the upstairs rads and I could feel a hot pipe to the tank, but no hot water at the taps.

[dave144]

bump?