Backflow Specialty Contractors in Washington
64 active, licensed backflow specialty contractors statewide.
| Business | City | Type | License # | Phone | Expires |
|---|---|---|---|---|---|
| 5 Star Backflow Services Inc | Kirkland | Plumbing Contractor | 5STARSB785RZ | (425) 516-3580 | 2027-01-09 |
| Aaa Backflow Ass Ts & Serv Llc | Everett | Plumbing Contractor | AAABABA744DU | (425) 870-9792 | 2028-03-31 |
| Aaa Backflow Asy Tstng/Svc Llc | Camano Island | Plumbing Contractor | AAABABA781PQ | (425) 870-9792 | 2026-10-18 |
| Aaa Fire Protection Inc | Seattle | Plumbing Contractor | AAAFIFP777PZ | (206) 284-1721 | 2027-09-29 |
| Aacra Backflow Testing/Repair | Snohomish | Plumbing Contractor | AACRABT795PD | (360) 631-0039 | 2028-03-04 |
| A-Bat | Everett | Plumbing Contractor | BAT****785KB | (425) 334-6423 | 2028-04-19 |
| Ace Backflow Only | University Pl | Plumbing Contractor | ACEBABO770M8 | (253) 250-1295 | 2027-07-28 |
| Adagio Backflow Testing | Bellingham | Plumbing Contractor | ADAGIBT759RA | (360) 223-2216 | 2027-12-18 |
| Advance Testing & Service Inc | Marysville | Plumbing Contractor | ADVANTS782PL | (425) 337-4175 | 2026-10-10 |
| Affinity Home Solution | East Wenatchee | Plumbing Contractor | AFFINHS779J1 | (509) 630-0456 | 2027-05-11 |
| Affordable Washingtn Bkflw Llc | Cle Elum | Plumbing Contractor | AFFORWB789JR | (360) 333-2057 | 2028-05-02 |
| Always Testing Inc | Mountlake Terrace | Plumbing Contractor | ALWAYTI782L7 | (206) 718-8378 | 2028-06-28 |
| Apex Backflow Services | Puyallup | Plumbing Contractor | APEXBBS776P7 | (888) 698-2739 | 2027-12-20 |
| A R Brown Backflow Testing | Lynnwood | Plumbing Contractor | ARBROBB760OF | (206) 818-6549 | 2026-09-09 |
| Archer Construction Inc | Kent | Plumbing Contractor | ARCHECI768PS | (253) 872-7222 | 2026-10-09 |
| Awa Backflow | Malott | Plumbing Contractor | AWABAB*780NA | (206) 369-5660 | 2026-08-09 |
| Axis Backflow Testing | Lake Forest Park | Plumbing Contractor | AXISBBT782DA | (206) 886-1860 | 2028-04-01 |
| Backflow Assembly Sltns Inc | Kingston | Plumbing Contractor | BACKFAS760K4 | (360) 908-7514 | 2028-05-24 |
| Backflow For Business | Gig Harbor | Plumbing Contractor | BACKFFB743C5 | (253) 900-2220 | 2028-02-24 |
| Backflow Johnny | Colbert | Plumbing Contractor | BACKFJ*779KD | (509) 998-5651 | 2027-05-17 |
| Backflows Northwest Inc | Bellevue | Plumbing Contractor | BACKFNI792QW | (425) 277-2888 | 2028-02-17 |
| Backflow Tri-Cities Llc | Pasco | Plumbing Contractor | BACKFTL774LZ | (509) 380-1552 | 2027-06-09 |
| Ballance Backflow Inspection | Colville | Plumbing Contractor | BALLABI754M1 | (509) 675-9933 | 2027-07-21 |
| Batmaster | Lake Stevens | Plumbing Contractor | BATMA**783L4 | (425) 397-0275 | 2026-07-12 |
| Bat Pro Backflow Services Llc | Blaine | Plumbing Contractor | BATPRPB786LP | (360) 722-2325 | 2026-07-27 |
| Bremerton Backflow Services | Bremerton | Plumbing Contractor | BREMEBS792P8 | (360) 405-0399 | 2028-02-21 |
| Brenneman'S Backflow Tstng Llc | Aberdeen | Plumbing Contractor | BRENNBT745DT | (360) 589-4163 | 2028-03-30 |
| Chelan Backflow Llc | Chelan | Plumbing Contractor | CHELABL744JZ | (509) 630-0021 | 2028-04-17 |
| Ck Backflow Llc | Oak Harbor | Plumbing Contractor | CKBACBL748BG | (360) 204-9133 | 2028-01-07 |
| Coffey Refrigeration | Kennewick | Plumbing Contractor | COFFER*789DA | (509) 586-1519 | 2027-03-07 |
| Columbia Fire Llc | Seattle | Plumbing Contractor | COLUMFL755RR | (206) 232-8569 | 2027-12-19 |
| Cosco Fire Protection Inc | Tukwila | Plumbing Contractor | COSCOFP784P7 | (206) 438-3360 | 2026-10-26 |
| Cross Connection Services | Puyallup | Plumbing Contractor | CROSSCS773RG | (253) 370-6880 | 2027-11-14 |
| Dixon Backflow Testing Llc | Seattle | Plumbing Contractor | DIXONBT751RQ | (206) 861-3578 | 2027-12-12 |
| Double Check Waterworks | Maple Falls | Plumbing Contractor | DOUBLCW746KE | (425) 281-4836 | 2028-05-05 |
| Emerald Fire Llc | Gig Harbor | Plumbing Contractor | EMERAFL749DT | (253) 857-2056 | 2028-03-19 |
| Empire Fire Protection | Bremerton | Plumbing Contractor | EMPIRFP762NR | (253) 352-3473 | 2026-09-12 |
| Fire Suppression Systems Llc | Everett | Plumbing Contractor | FIRESSS754LF | (425) 530-7422 | 2027-06-06 |
| Fix-It-Phil Backflow Svcs Llc | Tacoma | Plumbing Contractor | FIXITBS753N6 | (253) 209-9816 | 2027-08-26 |
| Flow Six Inc | Shoreline | Plumbing Contractor | FLOWSSI785BU | (206) 551-5242 | 2028-02-04 |
| Flume Road Water Services Llc | Bingen | Plumbing Contractor | FLUMERW787C4 | (509) 538-2643 | 2028-03-09 |
| Froula Alarm Systems Inc | Tukwila | Plumbing Contractor | FROULAS791OS | (206) 575-1962 | 2027-10-07 |
| Green Effects Inc | Pacific | Plumbing Contractor | GREENEI755CL | (253) 891-9888 | 2027-03-05 |
| Jack'S Backflow Testing Llc | Granite Falls | Plumbing Contractor | JACKSBT742JB | (425) 328-4031 | 2028-04-20 |
| Jm Waterworks | Cashmere | Plumbing Contractor | JMWATW*772N4 | (509) 860-2553 | 2027-09-28 |
| Mclm Llc | Tumwater | Plumbing Contractor | MCLMLL*788JH | (360) 970-5721 | 2028-04-04 |
| Mid-Columbia Backflow Llc | West Richland | Plumbing Contractor | MIDCOBL763P2 | (509) 222-0734 | 2026-10-22 |
| Mike'S Backflow Service | Spanaway | Plumbing Contractor | MIKESBS773JD | (253) 345-9658 | 2027-04-20 |
| Mjtk Backflow | Mercer Island | Plumbing Contractor | MJTKBB*763JA | (206) 786-6823 | 2028-04-01 |
| Northwest Fire Systems Llc | Kent | Plumbing Contractor | NORTHFS790NU | (206) 772-7502 | 2027-09-13 |
| Optimal Backflow Llc | Lynnwood | Plumbing Contractor | OPTIMBL743JC | (206) 569-8603 | 2028-04-06 |
| Pacific Backflow Services Llc | Richland | Plumbing Contractor | PACIFBS797ON | (509) 380-2086 | 2027-09-01 |
| Patriot Fire Protection Inc | Tacoma | Plumbing Contractor | PATRIFP788MJ | (253) 926-2290 | 2028-07-05 |
| Piche Backflow Testing | West Richland | Plumbing Contractor | PICHEBT772KE | (509) 539-1703 | 2027-06-05 |
| Pye-Barker Fire & Safety Llc | Kirkland | Plumbing Contractor | PYEBAFS741BG | (801) 395-8731 | 2028-02-06 |
| Red Hawk Fire Protection Llc | Puyallup | Plumbing Contractor | REDHAHF772DP | (253) 840-9900 | 2027-06-09 |
| Redwood Backflow | Redmond | Plumbing Contractor | REDWOB*794PL | (425) 495-1939 | 2027-10-21 |
| Smith Fire Systems Inc | Tacoma | Plumbing Contractor | SMITHFS748DP | (253) 926-1880 | 2028-03-17 |
| Stewie'S Fire Protection Llc | Des Moines | Plumbing Contractor | STEWIFP753JH | (206) 699-7839 | 2027-04-08 |
| West Coast Backflow Serv Llc | Port Angeles | Plumbing Contractor | WESTCCB762KT | (360) 477-9435 | 2028-05-30 |
| Western States Fire Prtctn Co | Bothell | Plumbing Contractor | WESTESF794O9 | (425) 881-0100 | 2026-07-19 |
| White Knight Fire Protectn Inc | Issaquah | Plumbing Contractor | WHITEKF798MG | (206) 251-1689 | 2027-08-30 |
| Wright'S Backflow Services Llc | Port Angeles | Plumbing Contractor | WRIGHBS758MG | (360) 460-0786 | 2027-08-12 |
| Zach'S Backflow Service Llc | Sequim | Plumbing Contractor | ZACHSBS762JR | (360) 801-1931 | 2028-04-19 |