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Watts Series LFNLF-9 Lead Free* Dual Check Vacuum Breakers for Laboratory Faucets prevent the reverse flow of polluted water from entering into the potable water supply. It consists of a brass body construction with chrome plating, dual check valves, stainless steel working parts, and durable rubber diaphragm and discs. Series LFNLF-9 is designed for health hazard, non-continuous pressure applications. It is specifically designed for laboratory faucets where portable hoses can be attached. Maximum Working Pressure: 150psi


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