My shower the pipes vibrate when hot water is turned on and water pressure goes way down what would cause this to happen ?

A loose or broken washer would cause the problem you describe. What's the brand name of the valve? One handled or two knobs? How old? Back to you. Tom

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Originally Posted by speedball1

A loose or broken washer would cause the problem you describe. What's the brand name of the valve? One handled or two knobs? How old? Back to you. Tom

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Thank you Tom that was what it was a broken washer on the diverter valve anyway thanks again Joe