Washington contractor
ADAGIO BACKFLOW TESTING
Registered in Washington for less than 1 year
- License number
- ADAGIBT759RA
- UBI
- 602587050
- Trade
- Plumbing(all plumbing contractors in Washington)
- L&I license type and specialty
- PLUMBING CONTRACTOR · BACKFLOW SPECIALTY
- City
- BELLINGHAM, WA(all contractors in Bellingham)
- Phone
- (360) 223-2216
Current verification
- Found: Active Washington contractor registration
- Found: Current liability insurance record found
- Found: No Attorney General complaint records found
- Review: No current bond record located; L&I does not publish savings assignments
From the state records below; each section shows its source and when it was last synced.
Registration
- Status
- ACTIVE
- Effective date
- December 18, 2025
- Expiration date
- December 18, 2027
Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.
Bond
Current bond
No current bond record located in the state's bond dataset.
L&I also accepts an assignment of a savings account in place of a bond. The state does not publish those in its open data, so this page cannot show one; L&I's Verify a Contractor tool does.
Source: L&I Contractor License Data - Bond, Washington State Department of Labor & Industries. Last synced October 9, 2026.
Liability insurance
Current policy
- Carrier
- State National Ins Co Inc
- Policy number
- NXTKT4YWHF00GL
- Coverage amount
- $1,000,000
- Effective date
- December 18, 2025
- Expiration date
- December 18, 2026
L&I publishes only the policy currently on file. Earlier policies are kept from our own nightly syncs, which began October 6, 2026.
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.
- DEL GIORGIO, DIANNA LIENSince November 24, 2025
- DEL GIORGIO, LUKE SAMUALSince December 10, 2025
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: ADAGIO BACKFLOW TESTING in BELLINGHAM. Complaints filed under another name or city are not included.
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 ADAGIBT759RA).