Changing water pressure on house pressure regulator.

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by kskier, Apr 30, 2010.

  1. kskier

    kskier Home Handyman

    Sep 4, 2007
    Home Handyman
    Buffalo NY
    I have an old inline whole house pressure regulator. My city water pressure is around 85 pounds. I have tried to adjust the regulator with a gauge attached right after the regulator with no change in pressure at gauge. 2 questions......the regulator is about 20 years it possible that it is not working.......and what is the proper procedure for adjusting the pressure on the regulator? The regulator is a Watts....thanks
  2. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego, CA
    The procedure is to make a couple of turns on the screw ( CW to increase pressure), then open a tap to allow flow for several seconds to allow the regulator to "settle". Then close the tap and see what the new pressure is.

    Are you trying to increase or decrease pressure? It would frankly be surprising if a 20 year old regulator is still working at all!
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona
    You should be able to RAISE the pressure without opening a faucet, but you cannot lower it without relieving the pressure somehow so you can tell what your adjustment is doing. IF the "adjusted" pressure is the same as the "raw" pressure the valve is not working.
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