rapid continous banging noise from pipes when one faucet opened

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by chad919, Jul 27, 2009.

  1. chad919

    chad919 New Member

    Jul 27, 2009
    I recently shut off my main water valve to do some bathroom plumbing and after i turned it back on I found that a very loud rapid continous banging rang through the system when i turned on a outside water faucet that is the first valve on the system after the pressure regulator. No other valve causes this when opened. Is my pressure regulator faulty fouled with debris? It is 30 years old. Adjusting the PRV seems to have no effect. The noise continues as long as the faucet is opened and is violent enough to rupture pipes I am sure! Any advice greatly appreciated. I

  2. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego, CA
    It can be the regulator. It can also be a loose washer in the valve which is causing the problem. BOth need to be investigated
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