Triangle gets its water from Prince William Water, which runs a cross-connection control program; its backflow rules call for testable devices to be tested at installation or repair and yearly, with results sent to its Cross Connection Coordinator. For a test, a leaking device or a new assembly, call the number on this page to be connected with a local plumber in Triangle.
Local conditions in Triangle
Triangle sits in southeastern Prince William County, wedged between Dumfries, Prince William Forest Park and Marine Corps Base Quantico, and is home to the National Museum of the Marine Corps. Most of its housing is fairly new, with a median year built of 1999, so sprinkler systems installed with those homes are now old enough for their backflow devices to need rebuilds.
Prince William Water names Triangle among the eastern county communities it supplies with Occoquan Reservoir water treated at Fairfax Water's Griffith plant. Virginia American Water also runs a separate Prince William system in the area, so if that name is on your bill, ask it about its own rules. Prince William Water's backflow program page is written mainly for commercial customers. If you have a sprinkler or pool assembly, call the Cross Connection Coordinator at (703) 335-8947 to ask whether your device is on file and when a test is expected. The utility uses chloramine most of the year and switches to free chlorine in spring, and it rates its water as moderately hard. Permits for new work come from Prince William County's Building Development Division (703-792-6930).
Your situation and the next step
| Situation | Next step |
|---|---|
| Recertification notice from Prince William Water | Book a certified tester; results go to the Cross Connection Coordinator |
| Sprinkler assembly with no test history | Ask the coordinator whether it is on file, then test it |
| Device leaking or cracked | Shut the irrigation supply; plumber repairs or replaces and retests |
| Adding irrigation or a pool fill | Plan the right assembly and any County permit before work starts |
| Bill from Virginia American Water | Ask that utility about its backflow rules |
Signs to watch for
- Water from the relief opening or vent during watering
- Weak sprinkler zones after work near the device
- A cracked body after a hard freeze
- Corrosion around test cocks and fittings
Seasonal notes
Close and drain outdoor assemblies before winter, and test in spring when the system is turned back on. Wooded lots near the forest park can drop leaves and debris around a device, so clear the area before the plumber arrives.
Backflow Testing questions in Triangle
Does an ordinary house need a backflow test every year?
How do I keep an outdoor backflow preventer from freezing?
Will I get a reminder when the next test is due?
Why is water dripping or spraying from my backflow device?
More plumbing services in Triangle
Backflow Testing nearby
Sources
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