Please note that Washington Water does not promote or recommend one company over another. For your convenience, this document is also available as a downloadable PDF.
| Company | Phone | Notes |
|---|---|---|
| 1st Choice Testing | (253) 720-0262 | |
| 5 Star Backflow Services | (425) 516-3580 | King |
| A+ Backflow Testing | (425) 830-3749 | King |
| AAA Fire Protection | (800) 223-3473 | King, Pierce |
| ABC Water Specialty | (425) 355-9826 | |
| Accurate Backflow | 253- 988-8300 | Pierce, Thurston |
| Ace Backflow Only | (253) 756-6626 | Pierce, Thurston, King, Kitsap |
| Advanced Irrigation, Inc. | (888) 833-6220 | Puget Sound |
| Affordable Washington Backflow Testing (David Foy) | (360) 333-2057 | |
| AJ’s Backflow Assembly Testing | (360) 900-7088 | (360) 265-0157 Kitsap, Pierce |
| All About Backflows | (253) 250-2807 | Pierce, Kitsap |
| Alpine Sprinklers Inc. | (425) 391-8701 | Issaquah |
| A-L-S American Landscape Services LLC | 360923-2224 | Pierce, Thurston |
| Always Testing, Inc. | (206) 718-8378 | |
| American Backflow Services | (877) 950-2468 | Puget Sound |
| Apex Backflow Services | (888) 698-2739 | Pierce |
| B.A.T Lady | (253) 514-9935 | Kitsap, Pierce, King |
| Backcountry Backflow | (360) 790-6594 | Thurston |
| Backflow Assembly Solutions Inc. | (360) 908-7514 | Kitsap, Pierce, Mason, Thurston |
| Backflow Pro’s Inc. | (360) 951-6130 | Kitsap, Lewis, Thurston, Mason, Pierce |
| Backflow VIP, LLC | (253) 987-9777 | East Pierce |
| Backflows Northwest Inc. | (425) 277-2888 | Puget Sound |
| Baroumes Backflow LLC | (253) 720-0537 | Pierce, East Pierce |
| BATMASTER | (425) 397-0275 | King |
| Biscay Irrigation & Backflow LLC | (360) 789-6549 | Thurston |
| Bremerton Backflow Service | (360) 405-0399 | Kitsap, Mason |
| Campbell Underground LLC | (253) 606-1301 | Gig Harbor, Pierce |
| Cascade Backflow Assembly Services | (360) 893-5419 | |
| Clearwater Utility Service | (253) 212-5433 | Thurston, Mason |
| Commercial Fire Protection | (800) 460-5990 | Orcas Island |
| Cross-Connection Services | (253) 370-8944 | Pierce |
| DC Backflow Service | (360) 477-9275 | Clallam, Jefferson |
| DM Backflow Testing | (253) 227-8858 | Pierce, Kitsap, South King, Thurston |
| Drain-Pro Inc. | (253) 926-5586 | Puget Sound |
| East Pierce Backflow | (253) 380-8380 | East Pierce |
| ECS Contracting LLC | (253) 878-6194 | Mason, Pierce, Kitsap |
| Emerald Fire LLC | (253) 857-2056 | Pierce |
| Evergreen Fire & Security | (253) 627-3794 | Puget Sound |
| Good Guy Backflow | (425) 516-7739 | |
| Ground Effects Landscaping LLC | (253) 333-9477 | Pierce, King |
| Honesty Backflow Tester | (253) 353-9496 | |
| James Salter DBA Pop’s Testing Service | (206) 551-5174 | |
| Jared’s Construction LLC | (253) 606-8735 | |
| Judge Plumbing | (360) 930-8220 | North Kitsap |
| Kimco Plumbing | (360) 394-7702 | Kitsap |
| Lacey Backflow & Irrigation LLC | (360) 216-9094 | Thurston |
| Lane’s Quality Service | (253) 229-8386 | Pierce, Thurston |
| McLaughlin’s Peninsula Backflow Service | (206) 890-8337 | Kitsap Peninsula, Gig Harbor |
| MCLM LLC | (360) 810-8020 | Thurston, Pierce, King, Kitsap |
| Mel’s Backflow Assembly Testing LLC Veteran Owned | (253) 905-5192 | East Pierce |
| Mike’s Backflow Service | (253) 345-9658 | Pierce, Thurston |
| Mr. Irrigation, Inc | (253) 926-0339 | Pierce |
| Mt. Si Plumbing & Heating Inc. | (425) 888-0433 | Issaquah |
| Olympic Landscape & Irrigation | (253) 922-7075 | |
| Patriot Fire | (253) 926-2290 | Puget Sound |
| Protected Waters | (253) 651-2550 | |
| Red Hawk Fire Protection | (253) 604-7328 | Puget Sound |
| Royal Waldock & Assoc. | (253) 549-5573 | Pierce |
| Silverdale Plumbing & Heating | (360) 692-5546 | Kitsap, Gig Harbor |
| Skip Beahm | (360) 340-5640 | Kitsap, Gig Harbor |
| Smith Fire Systems | (253) 926-1880 | |
| Sonny Beez Landscape & Maintenance | (360) 377-2496 | |
| Sound Home Maintenance LLC. | (253) 223-1554 | Pierce |
| Stop Inc. | (877) 380-7904 | Gig Harbor, South Kitsap |
| Summit Backflow Services | (253) 861-9845 | East Pierce, Gig Harbor |
| Swift Plumbing & Heating | (360) 297-9592 | Kitsap, Pierce |
| The Bathroom LLC | (360) 866-4041 | Thurston |
| Tom’s Plumbing | (360) 683-8336 | Clallam, Jefferson |
| Veteran Backflow Service | (253) 792-9400 | |
| VIP Backflow LLC | (360) 367-9251 | Issaquah |
| Woodland Gardens | (253) 405-0888 |
For more information on Cross Connection Control and Backflow Prevention and a list of Certified Testers and Device Installers please visit the Green River College and Washington Certification Services web page.