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The NIBCO® multi-turn boiler drain is manufactured from dezincification-resistant bronze, with a Buna-N seat. Please refer to NIBCO® technical data sheets and catalogs for engineering and installation information. Choose NIBCO® flow control products for the most specified, versatile and economical option in commercial and residential applications. NIBCO® boiler drain valves are backed by the NIBCO® 2 years limited warranty.