Washington contractor
CERTIFIED BACKFLOW TESTING INC
First registered in Washington on March 19, 2010
- License number
- CERTIBT905DU
- UBI
- 602487050
- Trade
- Plumbing(all plumbing contractors in Washington)
- L&I license type and specialty
- CONSTRUCTION CONTRACTOR · PLUMBING
- City
- SAMMAMISH, WA(all contractors in Sammamish)
- Phone
- (425) 427-8889
A newer license record under the same UBI is on file: CERTIFIED BACKFLOW TESTING INC, license CERTIBT781PC, EXPIRED, effective October 17, 2022. See Related licenses below.
Current verification
- Found: No Attorney General complaint records found
- Review: Registration is not currently active
- Review: Registration appears to be expired
- Review: 1 other license record under the same UBI
From the state records below; each section shows its source and when it was last synced.
Registration
- Status
- EXPIRED
- Effective date
- March 19, 2010
- Expiration date
- March 19, 2022
Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.
Related licenses
One other license number is registered under the same UBI, 602487050. A UBI identifies one business with the state; a business may hold more than one license, renew under a new number, or register a new license after an earlier one closed.
License CERTIBT781PC · PLUMBING CONTRACTOR · October 17, 2022 to October 17, 2024 · suspension date March 22, 2023
Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.
Bond
L&I does not publish bond records for contractors with EXPIRED status.
Source: L&I Contractor License Data - Bond, Washington State Department of Labor & Industries. Last synced October 9, 2026.
Liability insurance
L&I does not publish liability insurance records for contractors with EXPIRED status.
Source: L&I Contractor License Data - Insurance, Washington State Department of Labor & Industries. Last synced October 9, 2026.
People
Principals L&I lists for this license.
- HANSON, AMY ELIZABETHSince March 19, 2010
- HANSON, LOREN ROSSSince March 19, 2010
Source: L&I Contractor License - Principal Data, Washington State Department of Labor & Industries. Last synced October 9, 2026.
Attorney General complaints
No Attorney General complaint records found.
Matched on business name and city: CERTIFIED BACKFLOW TESTING in SAMMAMISH. Complaints filed under another name or city are not included.
One other registered contractor shares this business name and city: CERTIFIED BACKFLOW TESTING INC (CERTIBT781PC, EXPIRED). Complaints are matched by business name and city, so any complaint records shown here also appear on those pages. The records do not say which of these contractors a complaint was about.
A complaint record does not establish that the business violated the law.
Source: Attorney General Consumer Complaints, Washington State Attorney General's Office. Last synced October 9, 2026.
Record history
Changes to this contractor's state records since we began tracking them. The state's current-status tools do not show these.
No changes recorded since our records began on October 6, 2026.
Sources
- L&I Contractor License Data - General, Washington State Department of Labor & Industries
- L&I Contractor License Data - Bond, Washington State Department of Labor & Industries
- L&I Contractor License Data - Insurance, Washington State Department of Labor & Industries
- L&I Contractor License - Principal Data, Washington State Department of Labor & Industries
- Attorney General Consumer Complaints, Washington State Attorney General's Office
Record last synced October 7, 2026.
Check this record against the state directly on L&I's Verify a Contractor page (search by license number CERTIBT905DU).