RPZ Valve Testing in Killeen, Texas
A reduced pressure zone assembly is the strongest type of backflow protection in common use. We test it carefully and help you deal with relief valve discharge and drainage.
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About RPZ Valve Testing
A reduced pressure zone assembly, often called an RPZ or RP, is the device water providers usually call for where backflow could carry something harmful into the public supply. It has two independent check valves with a pressure zone between them and a relief valve that opens to dump water out of the assembly if either check starts to fail. You will find RPZs in Killeen at dental and medical offices, car washes, laboratories, funeral homes, commercial kitchens with chemical dispensers and boiler feeds where treated water could flow backward.
Because an RPZ protects against high-hazard conditions, testing is taken seriously. Most water providers expect these assemblies to be tested at installation and then on a regular schedule, often annually, with results reported. RPZs also face particular local challenges. Hard water and sediment can foul the relief valve and cause it to drip or discharge constantly. Assemblies mounted outdoors need an insulated enclosure to survive a hard freeze, and the enclosure needs proper drainage so water from the relief valve does not flood the box or nearby floors.
Our tester starts by checking the assembly and its surroundings, including the relief valve port, the air gap below it, and whether the drain or enclosure can handle a discharge. With the test kit connected, we measure the pressure drop across the first check, confirm the relief valve opens at the proper point, and check that the second check holds against back-pressure. The shutoff valves are tested to make sure they seal. We record every reading. If the relief valve has been dripping, we look for the cause, which is often debris on the first check.
Before the test, make sure the area around the RPZ is clear and that we can safely let water discharge during testing. Indoor assemblies need a drain or space where water can go without damaging anything. If your RPZ has been spitting water constantly, mention that when you call, since it often points to a part that needs cleaning or a rebuild. Medical and dental offices may want to schedule outside patient hours to avoid a shutoff during appointments. Call or use our form to set up RPZ valve testing in Killeen.
Looking for a full-service Killeen backflow testing company? Our crew handles every service, from the annual test to repairs, replacements and the paperwork.
Common Questions
Frequently Asked Questions
Why is water coming out of my RPZ valve?
The relief valve on an RPZ opens to dump water when the pressure in the zone between the two checks gets too close to the supply pressure. A constant drip often means debris or scale is holding the first check open, or the relief valve seat is worn. A sudden burst of water can follow a pressure drop in the street. Either way, it is worth having the assembly tested to find the cause.
What is the difference between an RPZ and a double check valve?
Both have two check valves, but an RPZ adds a relief valve between them that opens to the atmosphere. If either check fails, water drains out instead of flowing backward. That makes the RPZ suitable for high-hazard connections where backflow could carry chemicals or contaminants. A double check is generally used for lower-hazard lines. Your water provider usually decides which type a particular connection needs.
Can an RPZ be installed in a below-ground box?
Generally, no. Because the relief valve discharges water, an RPZ needs to sit above grade with space below it so the discharge drains away freely. If it were in a pit or vault, flood water could rise up to the relief valve and enter the assembly. That is why RPZs in Killeen are usually mounted above ground inside an insulated enclosure or installed indoors near a floor drain.
Does my car wash or restaurant need an RPZ?
Many do, because these businesses use chemicals, soaps or equipment connected to the water supply. The final decision usually rests with your water provider, which looks at the type of hazard at each connection. If you received a notice requiring an RPZ, or you are opening a new business in Killeen and are not sure what is needed, we can look at your setup and explain what is typical for similar properties.
Service Area
RPZ Valve Testing Near Killeen
Schedule a Backflow Test in Killeen
Have a notice with a due date, a failed test or a question about your backflow preventer? Call us. We will set up a test, explain the results and file the report with your water provider.
(254) 358-8706Or fill out the form and we'll be in touch shortly.