It is sometimes possible to adjust the pressure at the PRV to lower it. However, if the PRV is more than a few years old, this is often risky. By attempting to adjust it, it may stop working altogether or even start leaking.

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Although PRV issues usually happen slowly, sometimes problems can crop up overnight. If you have no water pressure throughout the house on both the hot and cold, your PRV may be bad. Make sure you check both the hot and cold water. If there is good pressure on the cold and not the hot it may be an issue with the water heater or the fixture itself.

When PRVs start to wear out, they can cause many strange issues with the water pressure throughout your home. As we go through these different symptoms, it is important to know that they will usually occur all over the house at the same time when they are caused by a failed PRV. If you are having any of these issues on only a single fixture in your home, then the issue probably isn’t with the PRV.

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Legacy Plumbing’s service area is on the north side of the Dallas Metroplex. Most of the PRVs around here are located on the main water line right where it comes up under the perimeter of the home in the front flower bed.

Few things are as essential as plumbing fixtures when maintaining and enhancing your home’s comfort. These fixtures help keep the water flowing where it’s needed

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Model 9201EFE Emergency Thermostatic Mixing Valve (patent pending) thermostatically mixes hot and cold water to provide a safe fluid supply for emergency eyewash equipment. Additionally, to ensure a fail-safe water supply for emergency eyewash stations, a series of cold water by-pass valves open in the event of hot water pressure loss. (No gauges supplied - ASSE 1071 standard recommends gauges be placed 5 to 8 feet (1.52 to 2.44 m) downstream for the most accurate temperature measurement.) A flow rate of 1 to 12 gpm (3.8 to 45.4 L) for better temperature control across the operating range AXION's superior design and technology provide a complete safety solution for increased victim comfort. Lowest internal pressure drop for this class of valve (advantage where supply pressure is low) Wax based thermostat technology for fast response time with proven highly reliable temperature control Highest Cold Water Bypass flow rate in the industry (83% of rated tepid flow rate) Brass valve design with internal check stops Over-sized valve seats resist failures caused by foreign matter A new and efficient shuttle design eliminates Thermostatic Mixing Valve sticking A custom funnel design improves temperature control at low flow rates Outlet temperature is factory set to 85° F (29° C). Tempered water: High temperature limit is factory set to 90° F (32° C). Cold water by-pass valves are closed during normal operation, regardless of flow rate. For important installation information, please read Scald Warning. CSA Listings: CSA certified per ASSE 1071, ANSI/ISEA Z358.1 and applicable sections of CSA B125.3.

The Pressure Reducing Valve (PRV) protects your home from water pressure that is higher than what the plumbing fixtures in your home were designed to handle. By code, water pressure inside your house should be between 40-80 pounds per square inch (psi). If the water pressure delivered by your water supplier is higher than that, a pressure reducing valve is installed on the main water line serving the home to bring this down to an appropriate level.

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Hopefully, this information helps you out. If you have any questions, feel free to give Legacy Plumbing a call. We are happy to help in any way we can.

On homes built after 2010, it is more common to find them in other places. Check in the garage for a wall panel with plumbing pipes inside. We have also located them in the walls under stairs, closets, and laundry rooms.

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If your faucets, toilets, or appliances need frequent repair, this could be a symptom of high water pressure. Most fixtures are rated for a maximum working pressure of 80 psi. If you have a pressure that is continually higher than this, parts will wear out and things will break more quickly.

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Model 9201EFE (patent pending) is a thermostatic mixing valve that mixes hot and cold water to supply tempered water of up to 12 gpm (45.4 L) for emergency eyewash fixtures. Unit employs a paraffin filled thermostatic mixing element. Lowest internal pressure drop where supply pressure is low, and a high Cold Water Bypass flow rate of 10 gpm (37.8 L). The improved brass design with a one piece casting uses internal check stops, over-sized valve seats, a shuttle design that eliminates valve binding, and a funnel design to improve temperature control with better mixing at low flow rates. Lime and calcium resistant components are used throughout. The outlet temperature factory setting is 85° F (29° C). Maximum operating pressure: 125 psi (8.62 Bar). Temperature adjustment range 60 - 90° F (16 - 35° C). Min/max inlet hot water temperature: 120°/180° F (49°/82° C), with recommended inlet temperature: 140° F (60° C). Min/max inlet cold water temperature: 40°/70° (4.4°/21.1° C). Inlet 1/2" NPT(F). Outlet 3/4" NPT(F).

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Model 9201EFE AXION® Emergency Tempering Valve thermostatically mixes hot and cold water to provide a safe fluid supply for a single emergency eye/face wash, with a flow rate of 12 gpm (38.8 L).

In this article, your local plumbing experts explain the symptoms of a bad pressure reducing valve that may need to be replaced.

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Repetitive knocking or consistent humming noises that seem to come from the walls when you run different fixtures are often caused by a failed PRV.

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Sometimes the valve itself will burst and start leaking. If you have a muddy or flooded spot in the flower bed, this could be the reason.

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These noises can also be caused by other things as well, such as a failed expansion tank, quick closing solenoid valves on new appliances, bad vacuum breakers, faulty valves with loose washers, worn-out toilets fill valves, improperly strapped pipes, etc.

Sometimes it can be a combination of these contributing factors. For more confirmation that the sound is caused by the PRV, go to where it is located and listen. It should be noticeably louder right next to the PRV.

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If your water pressure doesn’t seem to be as strong as it once was or you notice a significant loss of pressure when you use more than one fixture at the same time, your pressure reducing valve may be bad. If you don’t usually use different tubs and showers at the same time, you may first notice this issue when you have guests over and the demand is higher than normal.

The PRV won’t last forever, though. They are made with rubber parts and springs that will eventually wear out or get gummed up with particles in the water. Usually, PRVs fail slowly over time. It may take a while for you to notice there is an issue, especially if your usage habits aren’t very demanding.

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