Installing a Pressure Reducing Valve (PRV) helps maintain safe water pressure in your home protecting your pipes and appliances from potential damage. Check out our detailed guide to help you install a PRV.

Table of Contents
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    how-to-install-a-PRV

    Tools and Materials

    • Shovel
    • Teflon Tape
    • Pipe Cutter (or hacksaw)
    • Water Meter Key
    • Wrench
    • PRV
    • Screwdriver
    • Gloves
    • Pressure Gauge

    1. Turn Off the Main Water Supply

    Locate the main water shut-off valve, usually found near the water meter or where the main line enters your house.

    Turn it off and open a faucet at the lowest point in your home to drain any remaining water.

    plumber shutting off main water supply

    2. Turn Off the Main Water Supply

    Locate the main water shut-off valve, usually found near the water meter or where the main line enters your house.

    Turn it off and open a faucet at the lowest point in your home to drain any remaining water.

    plumbers digging near water line to install a PRV

    3. Cut the Main Water Line

    1. Use a pipe cutter or hacksaw to cut a section of the main water pipe where the PRV will be installed.
    2. Place a bucket under the pipe to catch any residual water.
    3. Ensure the cut edges are smooth and free of burrs for a proper fit.
    cut the main water line

    4. Prepare the Threads of the PRV

    Wrap Teflon tape around the threads of the pipe fittings to create a watertight seal. Wrap in a clockwise direction to ensure the tape stays in place when the fitting is tightened.

    prepare the threads of the PRV

    5. Install the PRV

    • Position the PRV so that the arrow on the valve body points in the direction of the water flow (towards your home).
    • Attach the PRV to the pipe ends using pipe fittings.
    • Tighten the fittings with a wrench, making sure not to overtighten, as this can damage the fittings or valve.
    plumber installing PRV near the home's water meter

    6. Tighten and Secure PRV Fittings

    • Securely tighten the PRV connections, ensuring there are no visible gaps or misalignment.
    • Use a second wrench to hold the pipe in place if necessary.
    tighten and secure PRV fittings

    7. Turn on the Water Supply Slowly

    • Gradually open the main shut-off valve to let water flow back into the system.
    • Check for any leaks around the PRV and fittings.
    turn on water supply

    8. Test and Adjust the PRV

    • Attach a pressure gauge to a nearby faucet to check the water pressure.
    • If needed, adjust the PRV by turning the adjustment screw on top of the valve.
    • Turn clockwise to increase pressure and counterclockwise to decrease it. Most residential settings aim for a pressure of 50-60 PSI.
    • Recheck the pressure gauge after adjustment.

    9. Final Leak Inspection

    Inspect all connections and fittings for any signs of leaking. If necessary, tighten the fittings further or reapply Teflon tape and reattach.

    10. Educate on Maintenance

    Regularly inspect the PRV and test the water pressure annually to ensure it remains within safe levels.

    pressure gauge on a hose bib

    Conclusion

    Installing a PRV can help extend the lifespan of your home’s plumbing system and prevent costly repairs. Following these steps carefully will ensure a successful installation. However, if you’re unsure or uncomfortable with any step, it’s best to consult a professional plumber for assistance.