Backflow Testing Airway Heights WA
Protecting the safety and purity of our municipal drinking water is a vital legal responsibility for every property owner. When hydraulic pressure shifts unexpectedly in water mains, contaminated water from lawn irrigation systems, commercial boilers, or fire suppression lines can be siphoned backward into the public drinking supply. Washington Plumbing provides certified backflow testing in Airway Heights, WA. Our state-certified backflow assembly testers conduct annual inspections, test differential pressure thresholds, perform precision rebuilds, and submit complete compliance documentation directly to your water purveyor.
Backflow Compliance Summary
- Mandatory Annual Testing: Required by Washington Department of Health (WAC 246-290-490).
- Purveyor Reporting: We file testing certification directly with local water departments.
- Certified Testers: Fully licensed and equipped with calibrated differential pressure test kits.
- Same-Day Repairs: Check valves, rubber seals, and relief valves rebuilt on site if assemblies fail.
Why Backflow Prevention Is Mandatory in Washington State
In accordance with Washington Administrative Code (WAC 246-290-490) and City of Airway Heights cross-connection control regulations, any plumbing system that connects to non-potable hazards must have an approved backflow prevention assembly. Common cross-connection hazards include:
- Underground In-Ground Lawn Sprinklers: Standing puddles containing chemical fertilizers, weed killers, animal waste, and biological pathogens can be sucked into sprinkler heads during a pressure loss event.
- Commercial Food & Beverage Facilities: Commercial soda machines, steam tables, and dishwashers located along the US 2 commercial corridor.
- Fire Suppression Sprinkler Systems: Stagnant water sitting in chemical fire protection pipes for years must never mix with domestic drinking water.
- Boilers & Hydronic Heating: Heating loops treated with glycol anti-freeze or corrosion inhibitors require heavy-duty backflow isolation.
Received an Annual Backflow Testing Notice?
Avoid water service shutoff notices and municipal fines. Call our certified backflow testing team at (253) 201-3775 to schedule your inspection.
Call (253) 201-3775Types of Backflow Assemblies We Test and Install
Different plumbing cross-connections present varying hazard tiers. We test, service, and install all approved backflow assemblies:
Pressure Vacuum Breakers (PVB)
Commonly installed on residential lawn irrigation systems. Must be installed at least 12 inches above the highest sprinkler head and tested annually to confirm spring-loaded poppet and air inlet valve operation.
Schedule PVB Test →Reduced Pressure Zone Assemblies (RPZ)
The gold standard for high-hazard commercial, industrial, and medical installations. Features two independent check valves and an intermediate hydraulic relief valve that vents water to atmosphere if backflow occurs.
Schedule RPZ Test →Double Check Valve Assemblies (DCVA)
Commonly utilized on fire sprinkler lines and low-hazard interior commercial systems. Can be installed indoors or in exterior subterranean vaults, requiring precision differential pressure verification.
Schedule DCVA Test →What Happens During a Backflow Test?
During your annual backflow test in Airway Heights, our certified technician connects a calibrated digital or analog differential pressure gauge to the test cocks on your backflow assembly. We verify that each internal check valve holds tight against reverse pressure, that the relief valve discharges at the precise differential threshold, and that shutoff valves seal completely without weeping.
If mineral grit or worn rubber disc seals cause an assembly to fail, our service vehicles carry complete manufacturer rebuild kits from Apollo, Febco, Watts, and Wilkins. We replace worn internal components on the spot, retest the assembly to verify full compliance, and immediately transmit the completed test report to the water purveyor on your behalf.
Call (253) 201-3775 to Book Certified Backflow Testing in Airway Heights
Fast scheduling, certified technicians, and seamless filing with Spokane County water purveyors.
Call (253) 201-3775