Bellevue · King County
Backflow testing in Bellevue — irrigation, fire lines & high-rise
Bellevue sends annual testing notices to every property with a backflow assembly on file — from a single irrigation PVB in Somerset to the stack of RPs and DCDAs under a downtown tower. We test it, fix it if it fails, and submit the report through Bellevue’s online tester portal.
Bellevue Utilities program
How Bellevue’s backflow program works
The short version, summarized from the utility’s own cross-connection control materials.
Source: City of Bellevue Utilities · verified October 2026 ↗State law (WAC 246-290-490) requires properties with a cross-connection to install a backflow assembly and test it every year.
If you have a lawn irrigation system or a fire sprinkler system, Bellevue requires a backflow assembly on it.
Only a Washington-certified Backflow Assembly Tester (BAT) may perform the test.
Bellevue mails testing notices in English and in translated versions (Chinese, Korean, Russian, Spanish and Vietnamese) — we’re happy to walk through yours by phone.
Report submission
Certified testers submit results through Bellevue’s online tester portal. Your report goes in the same day we test.
Questions for the utility: backflow@bellevuewa.gov · (425) 452-6800
On the ground
What we see in Bellevue
Every city’s housing stock and commercial mix shapes what’s in the meter box.
Big-lot irrigation
Bridle Trails and Somerset properties often run multiple irrigation zones off one assembly in a landscaped box. We locate, test, and leave the box cleaner than we found it.
Downtown towers
High-rise buildings carry domestic RPs, fire-line detector assemblies, and equipment isolation on boilers and cooling towers. We schedule around building engineers and test every assembly in one trip.
Neighborhoods
Serving all of Bellevue
- Downtown
- West Bellevue
- Somerset
- Factoria
- Eastgate
- Newport Hills
- Crossroads
- Lake Hills
- Bridle Trails
- Wilburton
- Woodridge
- Cougar Mountain
- Enatai
- Spring District
FAQ
Bellevue backflow questions
01 Who can test my backflow assembly in Bellevue?
02 How do backflow test reports get submitted to Bellevue Utilities?
03 How much does backflow testing cost in Bellevue?
04 What if my assembly fails in Bellevue?
Field test report · next due
Bellevue 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.