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Jan 16, 2023
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General Plumber
Not on the hot but whenever a cold tap is ran in the bathrooms or toilet flushed the two cold water pipes reverberate round the house.

The cold mains and the balanced cold.

We changed the water inlet valve with PRV last week but the problem has come back quickly.

Is the street pressure too high? Is the PRV a red-herring? It's all 3 bathrooms so I'm assuming it's "up-stream" somewhere.

What else may be causing it?
 

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