How to Lower Your Water Pressure in the House

Water pressure in a home is the amount, or flow, of water into the house through the main water pipe. If you live in a city, the water coming into your house is pressurized so that there is a constant flow of water available. If the water pressure in your home is too high, some of your household appliances that require water may start to malfunction. You can lower the water pressure in your home by adjusting the pressure regulator.

Difficulty: Moderate

Instructions

Things You'll Need:

• Wrench
• Adjustable wrench
• Screwdriver
• Pressure gauge

1. Place a water pressure gauge on an exterior faucet and then open the faucet all the way to find your home's current water pressure. Normal water pressure is around 50 psi (pounds per square inch).

2. Locate the pressure regulator for your home. The pressure regulator is typically located where the main water line enters the house.

3. Remove the cap over the pressure regulator (if necessary) to access the adjustment screw.

4. Determine the proper size wrench that is needed by trying various sizes until you find one that fits. You can also use an adjustable wrench.

5. Place the wrench on the screw and then turn the screw counterclockwise to reduce the water pressure.

6. Connect a pressure gauge to an exterior faucet and then open the faucet all the way.

7. Check the water pressure by reading the gauge. The gauge should read somewhere between 40 and 50 psi.

Tips & Warnings

• Have a licensed plumber install a pressure regulator if one is needed or required because of a law or ordinance.
• Over-adjusting the pressure regulator can result in too little water pressure.

References

• Pressure Regulator
• Household Water Pressure Regulators