Home › Coverage › Washington › Seattle
Backflow Testing in Seattle, Washington 98101
34% of buildings have 20 or more units.
Free to homeowners in Seattle — the contractor pays us for the introduction, you never do.
The short answer
In Seattle, 34% of buildings have twenty or more units. A containment assembly protects the public main and is tested on the purveyor’s schedule; the certificate reaching the purveyor is what the test is for.
Source: US Census Bureau, American Community Survey, table B25024, five-year estimates. A margin of error is published alongside every estimate.
34% of Seattle buildings carry twenty units or more. The test is annual in most jurisdictions and the certificate is the point of it.
What this site is
CrossConnect is a referral service, not a contractor. We connect property owners and managers with independent contractors. Backflow assembly testing is normally restricted to testers holding a specific certification and using calibrated equipment, and the report usually has to reach your water purveyor — ask to see the certification and ask who files the report. We carry out no testing, we certify nobody, we do not set prices, and we never charge callers anything. Nothing here selects a device for any installation or states that any assembly is passing.Seattle in numbers
| Occupied homes | 449,727 |
|---|---|
| Owner-occupied | 47% |
| Detached houses | 42% |
| Built before 1990 | 65% |
| Built since 2000 | 28% |
Backflow Testing coverage in Seattle, WA
Seattle is in King County, Washington. It covers 60 ZIP codes: 98101, 98102, 98103, 98104, 98105, 98106, 98107, 98108, 98109, 98111, 98112, 98113, 98114, 98115, 98116, 98117, 98118, 98119, 98121, 98122, 98124, 98125, 98126, 98127 and 36 more. We route backflow testing calls from every one of them.
Who requires the test
The water purveyor requires it, on a schedule it sets, usually annually. The plumber performs it; the certificate goes to the purveyor, and keeping a copy is the customer’s problem.
Containment, not isolation
A containment assembly at the service entry protects the public main from the building. An isolation assembly inside protects the building from one fixture. They are tested separately and the certificates are not interchangeable.
Nearby cities we cover
Checking a plumber in Washington
Washington licenses are issued by the Washington State Department of Labor and Industries, which publishes a public search you can use before work begins.
What happens when you call
No form, no quote tool, no waiting for an email.
- You tell us what the water is doingOne short conversation. If it turns out to be something you can fix in five minutes, we will say so.
- We route the call in SeattleWe match 98101 to an independent contractor who already covers Seattle — not a call center three states away.
- They quote, you decideWe do not set prices and we never charge you. The contractor pays us for the introduction.
Backflow Testing in Seattle? Tell us your ZIP code and what is happening. We route you to an independent contractor who covers ZIP 98101 and the other 59 this city covers. We carry out no work and set no prices, you are never charged, and the contractors pay us when we route a call.
Call (888) 764-9890