CERTIFIED BACKFLOW TESTING INC
Construction Contractor license CERTIBT905DU issued by the Washington State Department of Labor & Industries. Status shown as of August 17, 2026.
This license is expired. It lapsed on March 19, 2022, 1612 days ago. A contractor whose license has expired is not currently authorized to perform construction contractor work in Washington, and work performed under a lapsed license can affect your permits and your insurance claim.
| License holder | CERTIFIED BACKFLOW TESTING INC |
|---|---|
| Business name | CERTIFIED BACKFLOW TESTING INC |
| License type | CONSTRUCTION CONTRACTOR |
| License number | CERTIBT905DU |
| Status today | Expired |
| Expiration date | March 19, 2022 |
| City | Sammamish |
| County of record | Sammamish |
| Phone on file | 4254278889 |
| Classifications | CONSTRUCTION CONTRACTOR |
| Board status | Expired |
| Issuing authority | Washington State Department of Labor & Industries |
| First seen in public file | August 17, 2026 |
| Last confirmed | August 17, 2026 |
How to confirm this yourself
This page reproduces the L&I public license file, which the agency republishes daily. Before you hire anyone, confirm the record at the source and ask the contractor for proof of insurance separately, since licensing and insurance are not the same thing and the state file does not cover insurance.
Verify at L&I → File a complaint
There are 294 licensed construction contractors on record in Sammamish County. Compare them all →