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How Do I Reduce Water Pressure in My System?

Published in Plumbing Maintenance 3 mins read

To reduce water pressure in your system, the most common method involves adjusting the pressure regulator.

Here's a breakdown:

  • Locate the Pressure Regulator: This valve is usually located where the main water line enters your home, often near the water meter. It typically looks like a bell-shaped valve with a screw or bolt on top.

  • Identify Your Regulator Type: Most residential regulators are adjustable. Inspect the regulator for markings or a manufacturer name to identify the model if needed. This can help you find specific instructions online.

  • Adjust the Pressure Regulator:

    • Counter-clockwise Adjustment: Use a wrench or screwdriver to loosen the lock nut (if present) and then turn the adjustment screw counter-clockwise to decrease the water pressure. Make small adjustments (e.g., 1/4 turn) at a time.
    • Check the Pressure: After each adjustment, turn on a faucet to check the water pressure. You might need a water pressure gauge that can be attached to an outdoor faucet for a more accurate reading. Ideal water pressure for most homes is between 40 and 60 psi (pounds per square inch).
    • Tighten the Lock Nut: Once you've reached the desired pressure, tighten the lock nut to secure the adjustment screw in place.
  • Troubleshooting:

    • Stuck Regulator: If the regulator is stuck or not responding to adjustments, it might be faulty and require repair or replacement.
    • Pressure Too High Despite Adjustment: If you've adjusted the regulator to its lowest setting and the pressure is still too high, the regulator is likely malfunctioning.
    • Pressure Fluctuations: Significant pressure fluctuations might indicate a problem with the regulator or another issue in your plumbing system. Consult a plumber if you experience these issues.

Important Considerations:

  • Safety First: Always turn off the main water supply before attempting any major plumbing repairs or replacements.
  • Consult a Professional: If you're not comfortable working with plumbing or if you suspect a more serious problem, it's best to consult a qualified plumber. They can diagnose the issue and make the necessary repairs or adjustments.
  • Water Hammer: Reducing water pressure can also help prevent water hammer (the banging noise in pipes caused by sudden changes in water flow).

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