If your home’s plumbing system had a heart, it would be the Pressure Reducing Valve (PRV). These are also known as pressure regulators.

The PRV is located directly downstream of the whole house main shut off valve. By code it needs to be in an accessible location where it can be checked, calibrated, or replaced.

Why You Need a PRV

Pressure Reducing ValveWhen the municipalities distribute water, they use gravity and pumps to create adequate water pressure to ensure they can serve all the businesses and homeowners. This pressure is necessarily higher than the pressure you would want in your home or business. Therefore, the PRV is vital because it reduces the high pressure coming in from the street and lowers it to a tolerable level for the piping and fixtures used in homes and small businesses.

How Pressure Reducing Valves Work

Installed downstream of the main shut off valve in homes, commercial buildings, and manufacturing plants, a water pressure reducing valve automatically reduces the pressure from the water supply main.

Usually consisting of a bell-shaped brass housing, a spring-loaded, heat-resistant diaphragm connected to the outlet of the valve that acts upon a spring. This spring holds a pre-set tension on the valve seat installed with a pressure equalizing mechanism for precise water pressure control.

Most PRV’s have a certain rating or pressure that can be adjusted to. In some scenarios it is necessary to install them in series to correct for extreme high pressure.

At Champion Plumbing we only install the best PRV’s and always include a new main shut off valve with any PRV replacement. You will not find any other Plumbing company that offers this service. We feel the main shut off valve goes hand in hand with the PRV and is a critical component in your plumbing system.

Identifying Problems with a PRV

Symptoms that you may have a PRV problem, or may not have one installed include:

  • Moaning and whining pipes
  • Leaking or dripping shower heads
  • T&P valve is ejecting water at water heater
  • Toilets may run sporadically


Damage can also occur to the cartridges and diaphragms inside your faucets. A failing PRV can also damage your water heater.

The normal operating range for water pressure should be between 50-80 PSI.

If you feel you may have a water pressure issue, or would just like to have your pressure checked, call Champion Plumbing & Drain Cleaning in Canton, GA and we will be glad to test your water pressure and advise you of any corrective actions that should be taken.

Do you have questions about plumbing? We’ve got answers! Join our Facebook group Plumbing Questions and Answers, or check out our page About Plumbing. Feel free to call us at 770-480-5077.