The states and cities require RPZ's to be tested annually and rebuilt every five years. Backflow preventers stop the flow of chemicals contaminated or polluted water back into the domestic water system. Without these devices our water supply systems could be contaminated possibly causing diseases, physical and mental effects and even death. These devices require annual testing by certified personnel to ensure these devices are working properly. These devices are also required to be rebuilt every five years to make sure the devices will continue to protect our water supply.
(RPZ) Reduced pressure zone
(DCV/AV) Double check valve w/intermediate vent
(DCVA) Double check valve assembly
(SVB) Spill-proof vacuum breaker
(PVB) Pressure vacuum breaker
(AVB) Atmosphere vacuum breaker
(Hose VB) Hose vacuum breaker
(CV) Check valves, prevent unwanted reverse flow of liquids in plumbing systems
BWV) Back water valves prevent backflow of drainage system into a building
Royal Mechanicalís plumbers are certified to test RPZ/backflow preventers state-wide including the Twin Cities Metropolitan Area and Wisconsin.
Here are a few brands we handle: