Backflow Preventers

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Backflow preventers are essential devices designed to ensure the unidirectional flow of fluids, preventing contamination from back-siphonage or back-pressure. Back-siphonage happens with sudden pressure drops, while back-pressure occurs when the inlet pressure is less than the outlet. Reduced-pressure zone backflow preventers utilize a low-pressure zone between two check valves to safeguard against backflow in high-risk environments like medical facilities. Double-check backflow preventers employ mechanical resistance to reverse flow, ideal for medium-risk settings such as irrigation systems. Dual check backflow preventers also use mechanical means to block backflow, suited for low-risk applications including residential water systems. Combination fill backflow preventers control liquid entry into the valve chamber, preventing contamination from backflow.