Adjusting a pressure reducing valve ensures the water system functions efficiently and safely, prolonging the life of plumbing components while maintaining optimal water pressure.

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On most PRVs, there is an adjustment bolt or screw located on top of the valve body. This bolt or screw is typically protected by a cap that needs to be removed before making adjustments.

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Once the desired pressure is achieved, tighten the lock nut to secure the adjustment bolt or screw in place. This will prevent it from moving or being accidentally adjusted.

This 2 inch lead free reduced pressure zone assembly is designed to prevent the flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and for contaminants at the service line entrance. This assembly consists of a lead free bronze body, NPT end connections, quarter turn ball valve shutoffs with tee handles, top mounted test cocks, two in-line independent check valves, captured springs, and replaceable check seats with an internal relief valve for reduced space requirements.

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Before making any adjustments, use a pressure gauge to measure the current water pressure. Attach the gauge to a faucet or hose bib that is downstream of the PRV. This will give you the starting point and let you know how much adjustment is needed.

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After each adjustment, check the water pressure with the gauge to ensure you've reached the desired level. If necessary, repeat the adjustment process in small increments.

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Make small adjustments, turning the bolt no more than a half turn at a time. This will allow you to fine-tune the pressure without overshooting your desired level.

Many PRVs have a lock nut under the adjustment bolt or screw. Use a wrench to loosen the lock nut so that the adjustment bolt can be turned.

Adjusting a pressure reducing valve (PRV) is a simple process, but it requires care to ensure that the correct pressure is set and maintained. Here's how to adjust a PRV:

For residential water systems, the ideal pressure is between 40-60 psi. Anything over 80 psi is generally considered too high and can cause damage to plumbing fixtures and appliances.