About Certified Backflow Testing
Washington State’s Dedicated Backflow Testing Specialists Since 2003.
Certified Backflow Testing has been serving homeowners, businesses, and municipalities across Western Washington since 2003. We specialize exclusively in backflow assembly testing, repair coordination, and compliance reporting done fast, done right, and done without paperwork headaches.
Certified Backflow Testing was founded in 2003 by Loren Hanson with a singular focus:
reliable, professional backflow assembly testing.
Over two decades later, that focus hasn’t changed.
In 2023, CBT became part of Seattle Tacoma Olympia Plumbing STOP Inc., expanding operational capacity while maintaining the same dedicated backflow division and service-first mindset.
Certified Technicians
Every CBT technician is certified by the State of Washington and operates with calibrated testing equipment. We follow strict reporting standards required by local water purveyors to ensure accurate, compliant results every time.
Repairs & Replacements
Not every assembly passes inspection. When repairs or replacement are required we have the expertise through specialty plumbing licenses as well as journeyman plumbers to handle any contingency. Our one-stop solution ensures quick turnaround and continued compliance without delays.
