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A backflow preventer is a plumbing device installed within a water system to protect potable water from contamination caused by reverse flow. Under normal conditions, water moves in one direction, from the supply into the building or system. However, changes in pressure, such as a main break, pump failure, or high downstream demand, can create back-siphonage or back-pressure, allowing contaminated water from irrigation systems, fire lines, or industrial processes to flow back into the clean wate
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