ContractorName: Advance Backflow Testing ContractorPhone: 206-369-6178 LicenseNumber: 602-936-108 TypeOfWork: Sprinkler Backflow and Winterizing Recommended: Y Comments: ABT was listed by Covington Water and I used them for sprinkler backflow testing. When I learned they also did winterizing, and that their rate was much cheaper than previous company, I used them in the Fall. They are very professional, knowledgable, friendly, and perfomed the service as scheduled. I would recommend them for both services. ResidentName: Mike Smith Phone: 253-630-0878