About Us

Family owned small business

We are a family owned and operated small business that offers commercial and residential backflow testing services in Snohomish County and King County. We take pride in being honest, friendly, prompt, and competitive in our rates. Our number one goal is to provide the best service we can. We promise to take every measure in making sure your property looks the same when we leave as when we arrived, and to always be honest and up front with our pricing. Please call for rates. We look forward to partnering with you for all your backflow testing needs. 

Meet the owners

Josh and Leslie VanQuaethem are the owners of 5 Star Backflow Services. Josh worked several years in public works before starting 5 Star Backflow Services. During his time in public works he became interested in safe water practices and as a result became fascinated with backflow testing and backflow repair. He is a licensed backflow assembly tester, specialty plumber and has previously held certificates in water distribution management and cross connection and is a graduate from the University of Washington. Leslie VanQuaethem keeps the books and takes care of the financials for 5 Star Backflow. She is a graduate from Western Washington University. 

Why choose 5 Star Backflow Services

When you use 5 Star Backflow you will be treated with respect and kindness. All communication will be responded to with promptness, your test reports will be delivered to your water purveyor in a timely manner, and our wealth of knowledge regarding backflow testing and repair will put you at ease. Our name is our gaurantee, but please don't take our word for it. See what our customers are saying about us. We would love to have you join the conversation.


5 Star rates