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King County · About 35 min from our base

Backflow Testing in SeaTac, WA

State-certified backflow testing, repair and installation for SeaTac homes, HOAs and businesses, with your test report filed with your water purveyor for you.

Book a test in SeaTac (206) 549-4992
  • WA-certified testers
  • Reports filed for you
  • 24/7 emergency dispatch

SeaTac's economy runs on the airport: hotels, restaurants, parking operators, car-rental facilities and car washes line International Boulevard, and most of them depend on reduced-pressure assemblies that can't be allowed to lapse. Neighborhoods around Angle Lake and McMicken Heights add plenty of residential irrigation too.

We test, repair and install assemblies throughout SeaTac, and we're used to working around operations that never close.

Backflow services in SeaTac

Who is your water purveyor in SeaTac?

Your purveyor is the water utility that sends your annual test notice and receives your test report. Depending on your address, SeaTac properties are commonly served by Highline Water District.

Not sure which one is yours? Check the top of your water bill or the test notice itself. Or just give us your address when you book and we'll figure it out and send your report to the right place.

Local know-how

Car washes and vehicle-service facilities use chemicals and booster pumps, which create both backpressure and high-hazard conditions. They typically need reduced-pressure assemblies, often more than one, and we keep them all on schedule.

Neighborhoods we serve

  • International Boulevard corridor
  • Angle Lake
  • McMicken Heights
  • Bow Lake
  • Riverton Heights
  • North SeaTac

ZIP codes

98158, 98168, 98188, 98198, plus surrounding unincorporated areas.

How backflow testing works in SeaTac

  1. Book

    Call or book online. Have your test notice handy if you got one.

  2. We test

    A certified tester checks every valve with a calibrated gauge, usually in under 30 minutes per assembly.

  3. We fix

    If it fails, we explain why and quote the repair. Most repairs can be done on the spot.

  4. We file

    Your passing report goes to your purveyor, and a copy comes to you.

SeaTac backflow FAQs

Can you test at a hotel without shutting off water to guests?

Usually, yes. Many hotels have parallel assemblies, so one can be tested while the other carries the flow. Where they don't, we schedule the short shut-off for the quietest time.

Who receives backflow reports in SeaTac?

Most of SeaTac is served by Highline Water District, with some areas on neighboring districts. We'll file with whichever serves your property.

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