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Advice Needed for Water From Shower When Sink Tap Running

Postby Rob Ranger » Mon Jan 02, 2017 10:01 pm

Can anyone assist?

In our bathroom when I turn the hot tap on at our sink, water starts to come out of the shower head and there is a grinding noise. This happens every day, not all the time, probably 2 or 3 times a day. we have a gas combi boiler. Is this something I should worry about or get checked?

The shower mixer is a Triton Luca thermostatic bar mixer.

A plumber did put a new rubber washer in the non-return valve a few months ago, but I don't know if this is related to it. I have attached a video clip at...

any thoughts what could be causing this?
thanks in advance.
Rob Ranger
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