Backflow preventers stop contaminated water from mixing with potable drinking water.  They are found in homes and offices throughout the community.   


The EPA requires that backflow preventers be tested at least once a year.


Johns Plumbing has five experienced, certified plumbers who have expertise testing and maintaining backflow preventers.   We are able to test a range of backflow preventers, including those in irrigation and fire systems.  We can provide repair parts or perform scheduled cleanings.  


​Johns Plumbing is also experienced in cleaning, repairing and replacing water filters and dispensers.  





  Backflow Testing