A pressure reducing valve (PRV) is a mechanical device installed in a plumbing system to decrease incoming water pressure to a desired level, protecting fixtures and appliances from excessive pressure.

PRVs are typically installed at the main water supply line, where it enters the building, ensuring that all water fixtures and appliances receive regulated pressure.

PRVs often have an adjustable knob or screw that allows you to set the desired outlet pressure. Adjustments should be made gradually while monitoring water pressure with a gauge.

Installing a PRV can protect pipes and fixtures from damage caused by high water pressure, reduce noise from water flow, save energy by optimizing water usage, and improve overall plumbing system efficiency.