Best Backflow Preventer Replacement in Irvine CA

Very responsive service! Anthony showed up within hours of the call, to fix a leak in the fire sprinkler line. Highly recommended!!

Had a backflow on my property for years and it wasn't​ until recently that I was mandated by the city to have it inspected. I called one flow and spoke to John who happened to be the owner. After a brief conversation on backflows, he realized he wasn't too far from my property and told me he could stop by after his current appointment. Upon arriving he gave me a crash course on the device and the importance of testing backflows. He then gave me a quote before any work was done (a real rarity with contractors). John provided​ Great customer service and provided testing the same day I​ called​! I will be using john and one flow for all my backflow needs in the future!