Elasto-Valve Rubber Products (EVR), a manufacturer of rubber duckbill check valves, is drawing attention to the expanding role of duckbill valve technology in backflow prevention across wastewater, ...
DENVER (KDVR) — Longmont Public Safety is trying to stop people from taking backflow preventers but with incidents of the thefts on the rise, officials need help. The valves are found at commercial ...
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