Updated: Jul 28, 2026
Location
Address
344 n 138th St., Seattle, WA, 98133
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Dixon Backflow Testing Plumber
Dixon Backflow Testing LLC, 344 N 138th St, Seattle, WA (Employee: Mark Dixon) holds a Plumbing Contractor, Plumbing Contractor license according to the Washington license board.
Their BuildZoom score of 94 ranks in the top 24% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Dixon Backflow Testing LLC, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Dixon Backflow Testing LLC Services
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Dixon Backflow Testing LLC Contact Information
Phone Number: (206) 861-3578
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Address: 344 n 138th St., Seattle, WA 98133
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Verified License
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Dixon Backflow Testing LLC License info
Verified License
| License # | DIXONBT751RQ |
| Status | Active |
| State | Washington |
| Type | Plumbing Contractor, Plumbing Contractor |
| Date Issued | 12-12-2025 |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Dixon Backflow Testing LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
94
BuildZoom Score
Insured
| Insurer | American Fire & Casualty Co |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Western Surety Co |
| Bond Value | $6,000 |
Dixon Backflow Testing LLC Employees
MD
Mark Dixon
Partner/Member