Renton · King County
Backflow testing in Renton — submitted through iBackflow
Renton moved its cross-connection program onto iBackflow in March 2024. Your tester needs an account in that system to file your report — we have one, and we submit the day we test.
Renton Water Utility program
How Renton’s backflow program works
The short version, summarized from the utility’s own cross-connection control materials.
Source: City of Renton Water Utility · verified October 2026 ↗Backflow assemblies are tested on installation and annually thereafter by a state-certified Backflow Assembly Tester.
Installation and annual test results must be sent to the City of Renton.
Renton’s Cross Connection Control Specialist can advise on installation questions.
Report submission
Testers file through iBackflow, which went live for Renton on March 1, 2024. There’s no extra charge to you for online filing.
Questions for the utility: backflow@rentonwa.gov · (425) 430-7207
On the ground
What we see in Renton
Every city’s housing stock and commercial mix shapes what’s in the meter box.
Commercial & light industrial
The Valley and the airport corridor are full of shops, warehouses and food service with RP assemblies at the meter. We work around your business hours, including early mornings.
Neighborhoods
Serving all of Renton
Parts of the Renton area — including some Benson Hill, Fairwood and Skyway addresses — are served by other districts such as Soos Creek, Cedar River Water & Sewer, or Skyway Water & Sewer. Your water bill will tell you which.
- Downtown
- The Landing
- Highlands
- Kennydale
- North Renton
- Talbot Hill
- Benson Hill
- Cascade
- Fairwood
- Maplewood
- Valley
FAQ
Renton backflow questions
01 Who can test my backflow assembly in Renton?
02 How do backflow test reports get submitted to Renton Water Utility?
03 How much does backflow testing cost in Renton?
04 What if my assembly fails in Renton?
Field test report · next due
Renton 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.