Loud Humming Upstairs When Turning On Cold Kitchen Tap

23 Jun 2014
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United Kingdom

Im having a bit of an annoying time with my pipes :oops:

The past week or so whenever I turn on the cold tap in the kitchen on past half way I hear a loud humming noise from somewhere above which is around the bathroom area upstairs. The noise is like im turning on a pump and has that sort of loud humming sound.

I just cant work out what it is?

Water comes into the house under the kitchen sink via the stop tap and we have a PRV connected that is currently set to approx 3bar and hasnt been touched for a while.

It only seems to be the cold kitchen tap that causes the noise.

Any ideas where to start?
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