Butterfly Valves

Deringer Backflow Preventers with butterfly valves stop non-health hazardous pollutants from entering a water supply during backflow or back siphonage. The Deringer 20, 30, 40 and 50 utilize two independent Dual Action Check modules and two integral resiliently seated shut-off valves, all contained within a single rigid valve housing, giving it the shortest lay length on the market. We have a range of Backflow Preventers with butterfly valves on our site, check them out today!