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 |
|---|---|---|
| A+ Backflow Testing | (425) 830-3749 | |
| ABC Water Specialty | (425) 355-9826 | |
| All About Backflows | (253) 756-6626 | |
| Accurate Backflow | (253) 988-8300 | |
| Ace Backflow Only | (253) 756-6626 | Pierce, Thurston, King, Kitsap |
| Advanced Irrigation, Inc. | (888) 833-6220 | |
| Affordable Washington Backflow Testing (David Foy) | (360) 333-2057 | |
| AJ’s Backflow Assembly Testing | (360) 265-0157 (360) 900-7088 |
|
| All Backflow Testing | (206) 669-9968 | |
| A-L-S American Landscape Services LLC | (360) 923-2224 | Pierce, Thurston |
| Always Testing, Inc. | (206) 718-8378 | |
| American Backflow Services | (877) 950-2468 | |
| Apex Backflow Services | (888) 698-2739 | |
| Aqua Backflow Testing | (253) 682-7208 | |
| Available Backflow Testers | (425) 652-9970 | |
| Alpine Sprinklers Inc. | (425) 391-8701 | Issaquah |
| B.A.T Lady | (253) 514-9935 | Kitsap, Pierce, King |
| B.A.Tman Testing | (206) 228-1618 | King, Pierce |
| Backflow Pro’s Inc. | (360) 951-6130 | Kitsap, Lewis, Thurston, Mason, Pierce |
| Backflow VIP, LLC | (253) 987-9777 | |
| Backflows Northwest Inc. | (425) 277-2888 | |
| BATMASTER | (425) 397-0275 | |
| Bremerton Backflow Service | (360) 405-0399 | Kitsap, Mason |
| Backcountry Backflow | (360) 790-6594 | |
| Cambell’s Backflow – Landscaping & Irrigation | (253) 426-2321 | |
| Campbell Underground LLC | (253) 606-1301 | |
| Cascade Backflow Assembly Services | (360) 893-5419 | |
| Biscay Irrigation & Backflow LLC | (360) 789-6549 | Thurston |
| Commercial Fire Protection | (800) 460-5990 | Orcas Island |
| Cross-Connection Specialists | (253) 840-2501 | Pierce |
| D&B Backflow Services | (253) 970-0244 | |
| 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 | |
| East Pierce Backflow | (253) 380-8380 | |
| Emerald Fire LLC | (253) 857-2056 | |
| Evergreen Fire & Security | (253) 627-3794 | |
| Flo Hawks | (253) 848-2371 | |
| Good Guy Backflow | (425) 516-7739 | |
| Patriot Fire | (253) 926-2290 | |
| Honesty Backflow Tester | (253) 353-9496 | |
| James Salter DBA Pop’s Testing Service | (206) 551-5174 | |
| Jared’s Construction LLC | (253) 606-8735 | |
| Jeremey Christensen | (206) 963-1274 | |
| Joel Steck DBA 1st Choice Testing | (425) 273-3106 | |
| Judge Plumbing | (360) 930-8220 | North Kitsap |
| Knight Fire Protection Inc. | (360) 786-8606 | Thurston |
| 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 |
| MCLM LLC | (360) 810-8020 | Thurston, Pierce, King, Kitsap |
| Mel’s Backflow Assembly Testing LLC | (253) 905-5192 | |
| Mr. Irrigation, Inc | (253) 926-0339 | Pierce |
| Mt. Si Plumbing & Heating Inc. | (425) 888-0433 | Issaquah |
| Nautilus Backflow Service | (253) 564-1905 | Pierce |
| Olympic Landscape & Irrigation | (253) 922-7075 | |
| Orcas Waterscapes LLC | (360) 298-0717 | Orcas Island |
| Protected Waters | (253) 651-2550 | |
| Royal Waldock & Assoc. | (253) 460-7672 | |
| Silverdale Plumbing & Heating | (360) 692-8840 | Kitsap |
| Skip Beahm | (360) 692-5546 | Kitsap, Pierce |
| Smith Fire Systems | (253) 926-1880 | |
| Sonny Beez Landscape & Maintenance | (360) 377-2496 | |
| Swift Plumbing & Heating | (360) 297-9592 | |
| The Plumbing Joint | (800) 464-3204 | |
| Tom’s Plumbing | (360) 683-8336 | Clallam, Jefferson |
| TruGreen – Landscape Maintenance | (253) 278-6643 | |
| Veteran Blackflow Service | (253) 792-9400 | |
| VIP Backflow LLC | (360) 367-9251 | Issaquah |
| West Coast Fire Systems | (503) 347-9773 | |
| 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.