Washington contractor
BACKFLOW TESTING & SERVICE INC
First registered in Washington on August 5, 2011
- License number
- BACKFTS893MR
- UBI
- 602795219
- Trade
- Plumbing(all plumbing contractors in Washington)
- L&I license type and specialty
- CONSTRUCTION CONTRACTOR · PLUMBING
- City
- LAKE STEVENS, WA(all contractors in Lake Stevens)
- Phone
- (425) 334-3350
Current verification
- Found: No Attorney General complaint records found
- Review: Registration is not currently active
- Review: Registration appears to be expired
From the state records below; each section shows its source and when it was last synced.
Registration
- Status
- EXPIRED
- Effective date
- August 5, 2011
- Expiration date
- August 30, 2021
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.
- WAHLMAN, KRISTEN WOOLWINESince July 18, 2011
- WAHLMAN, THOMAS GERARDSince July 18, 2011
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: BACKFLOW TESTING SERVICE in LAKE STEVENS. Complaints filed under another name or city are not included.
One other registered contractor shares this business name and city: BACKFLOW TESTING & SERVICE LLC (BACKFTS785MJ, 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 BACKFTS893MR).