Close the valves and release any water by using a screwdriver to turn the test ports to release any water that is in the backflow preventer. For a visual, here’s a report from KHOU 11’s ...

For over 100 years, Norblom Plumbing has been the go-to provider for a range of plumbing services, including water heater repairs or replacements, sump pump repairs or ... RPZ Testing & Backflow ...