Disclaimer: West Sound Utility District provides this list as a service to our customers. This is not a complete list of state certified testers, but rather a list of testers who have provided documentation that shows that all of their applicable certifications are current. The District does not warranty any work performed by anyone on this list.
1st Choice Testing
(435) 273-3106
Ace Backflow
(253) 756-6626
Affordable Washington Backflow
(360) 333-2057
(206) 972-7505
Aj’s Backflow Testing
(360) 265-0157
AJ2 Backflow Testing
(360) 900-7088
All About Backflow's
(253) 234-5207
Backflow Assembly Solutions
(360) 908-7514
(360) 271-7393
Backflows Northwest
(425) 277-2888
BAT Lady
(235) 514-9935
BATMASTER
(425) 397-0275
Bremerton Backflow Services
(360) 405-0399
CK Backflow
(360) 204-9133
D&M Commercial Plumbing, Inc.
(253) 627-3300
Fire Solutions NW
(253) 302-2350
Silverdale Plumbing and Heating
(360) 692-8840
Steven Beahm
(360) 602-0197
Swift Plumbing & Heating Inc.
(360) 297-9592
White Knight Fire Protection Inc.
(206) 521-1689
Last Update: 12/16/2025