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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Plumbing Questions >> Hot water in my cold water tank - help please! https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1278968926 Message started by remery on Jul 12^th, 2010, 10:08pm

Title: Hot water in my cold water tank - help please!
Post by remery on Jul 12^th, 2010, 10:08pm

My cold water tank is overflowing. Somehow warm water is getting into the cold water tank and causing the water level to rise and overflow. It's not the ball valve, nor is it coing from the immersion heater expansion pipe. I think it's somehow coming back up the pipe that feeds the water heater. I think it might be something to do with one of our mixer taps. Please can anyone explain how to fix this. Is this just a question of replacing the mixer (if it is that)? Any help would be much appreciated!

Title: Re: Hot water in my cold water tank - help please!
Post by thescruff on Jul 13^th, 2010, 12:41am

Hey what do you need us for [smiley=thumbsup.gif]

Fit a single check valve on the hot pipe to the mixer tap.

It could be any mixer tap with mains cold.

There are other reason but less likely, so go for the check valve first.