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How Do I Adjust a Water Pressure Regulator?

Published in Plumbing Repair 2 mins read

Adjusting a water pressure regulator involves loosening a lock nut and then turning an adjustment screw to either raise or lower your water pressure. Here's a step-by-step guide:

  1. Locate the Water Pressure Regulator: This is typically a bell-shaped device found where your main water line enters your house.

  2. Identify the Adjustment Screw and Lock Nut: On top of the regulator, you'll see an adjustment screw. Below it is a lock nut.

  3. Loosen the Lock Nut: Using a crescent wrench, loosen the lock nut by about half a turn. This frees up the adjustment screw.

  4. Adjust the Water Pressure:

    • To increase water pressure: Turn the adjustment screw clockwise.
    • To decrease water pressure: Turn the adjustment screw counterclockwise.
  5. Monitor the Pressure: You'll need a water pressure gauge to see the current pressure. These gauges can be temporarily attached to an outside faucet or laundry machine connection. Adjust in small increments and check the gauge after each adjustment. A typical home water pressure should be between 40 and 60 psi.

  6. Tighten the Lock Nut: Once you've reached your desired pressure, tighten the lock nut with the crescent wrench to secure the adjustment screw in place.

  7. Recheck the Pressure: After tightening the lock nut, check the water pressure one last time to ensure it hasn't changed.

Important Considerations:

  • Start Slowly: Make small adjustments and check the pressure frequently to avoid over-pressurizing your system.
  • Check Local Codes: Some areas have specific requirements for water pressure.
  • Troubleshooting: If you can't adjust the pressure, the regulator may be faulty and need replacement.
  • Professional Help: If you're uncomfortable making this adjustment yourself, contact a qualified plumber.

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