Double Check Valve Testing in Killeen, Texas
Double check valve assemblies are common and dependable, but they often sit in muddy boxes. We get to the test cocks, run an accurate test and leave the box in better shape.
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About Double Check Valve Testing
A double check valve assembly, often shortened to DCVA or double check, uses two spring-loaded check valves in a row, each designed to close if water tries to move backward. It also has two shutoff valves and four test cocks for attaching a test kit. Water providers typically accept a double check on connections considered lower hazard, which in Killeen often means residential and commercial irrigation, some domestic water services and certain fire lines. Double check valve testing confirms that each check holds tight and that the shutoffs close fully.
Many double checks in the Killeen area are installed below ground, inside a plastic valve box in the lawn or a concrete vault near the street. Those boxes collect rainwater, clay, roots and ants, and after a heavy spring storm the assembly can be completely underwater. That makes the test harder to run and can damage test cocks over time. Hard water also leaves scale inside the checks, which can keep them from seating fully. Regular testing catches these problems before a check quietly stops doing its job and the provider sends a failure notice.
Our tester opens the box or vault and, if needed, pumps out water and clears mud and debris until all four test cocks can be reached cleanly. Then we flush each test cock, attach a calibrated test kit, and test the first and second check to confirm each holds the required pressure difference. We also check that the second shutoff valve seals. Readings go into the record along with the make, model, size and serial number. Before we close the box, we note any problems we see, such as a cracked lid or poor drainage.
To make the visit easier, let us know where the box or vault is, especially if it is under shrubs or covered by grass. Keep pets inside, since gates may need to stay open briefly while we work. If the box has been underwater for a while, tell us when you schedule so we can come prepared with the right pump. Commercial owners should mention whether the vault has a locked lid or sits near traffic. When you are ready, call or use the form to schedule double check 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
Where is my double check valve assembly located?
On most Killeen homes with sprinklers, a double check sits in a rectangular valve box in the yard, often near the water meter or along the side of the house. On commercial properties, it may be in a vault near the street, in a mechanical room, or above ground behind a cage. If you cannot find it, our tester can usually locate it by following the line from the meter or the sprinkler controls.
Why did my double check fail the test?
The most common reasons are debris or mineral scale holding a check slightly open, a worn rubber seat or disc, or a weak spring. Sometimes the shutoff valve does not seal, which can affect the readings. Assemblies that sit underwater in a box tend to collect grit that works its way inside. We explain what failed and whether cleaning, a rebuild kit or a replacement is the sensible next step.
Is a double check acceptable for my property?
That depends on the hazard at the connection, and the decision usually belongs to your water provider. Double checks are generally used for lower-hazard situations such as many irrigation systems and some domestic lines. Connections where chemicals or contaminants could enter the water may require an RPZ instead. If you are unsure whether your current assembly is the right type, we can look at it and explain what is typical.
Should my double check be moved above ground?
Not necessarily. Below-grade double checks are common and can work well when the box drains properly and stays reasonably clean. If your box floods after every rain, the lid is broken, or the assembly is hard to reach, raising it or rebuilding the box can make sense. Some water providers have preferences on placement for new installs, so we can check with yours before making any change.
Service Area
Double Check 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.