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Mixer tap issue.

343 Views 4 Replies 3 Participants Last post by  Sneeky_King
Hi there, Just wondering is it normal for cold water to be pushed up the hot water pipe from the mixer tap? We have a mixer tap on our kitchen sink and when I use the hot water its fine but when I turn on the cold water it turns cold and Noticed the hot water pipe that was hot before I turned on the cold water, then the hot water pipe turned cold. Could this cause the tank in the loft/attic to over fill?

Kind regards
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More like the tank is not full, if you leave this running like this does it go back to normal after a few, minutes?
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