Tukwila · King County
Commercial backflow testing in Tukwila
Tukwila is one of the most commercial cities in the region — Southcenter retail, Duwamish industry, and a dense ring of hotels, restaurants and warehouses. Nearly every one of those buildings has backflow assemblies that need a passing test every year.
City of Tukwila program
How Tukwila’s backflow program works
The short version, summarized from the utility’s own cross-connection control materials.
Source: City of Tukwila Water Utility / Highline Water District · verified October 2026 ↗The City of Tukwila operates its own water utility serving residential, commercial and industrial customers.
Parts of Tukwila are served by Highline Water District instead.
State law (WAC 246-290-490) requires every assembly to be tested at installation, after repair and annually by a certified tester.
Report submission
We submit your report to the City of Tukwila or Highline Water District, depending on who serves your address.
On the ground
What we see in Tukwila
Every city’s housing stock and commercial mix shapes what’s in the meter box.
Southcenter retail & restaurants
Food courts, restaurants and big-box stores carry RP assemblies at the meter and on kitchen equipment. We schedule before doors open.
Warehouses & industrial
Distribution centers and manufacturers in the Duwamish and Green River valleys run fire lines with DCDAs and process water with RPs — we test both on one visit.
Neighborhoods
Serving all of Tukwila
- Southcenter
- Tukwila International Blvd
- Allentown
- Foster
- Duwamish
- Riverton
- Cascade View
- Tukwila Hill
FAQ
Tukwila backflow questions
01 Who can test my backflow assembly in Tukwila?
02 How do backflow test reports get submitted to City of Tukwila?
03 How much does backflow testing cost in Tukwila?
04 What if my assembly fails in Tukwila?
Field test report · next due
Tukwila test due? We’ll handle it.
Book online in two minutes. We test, repair if needed, and file the report with your water utility — and remind you next year.