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Groove x Groove Check Valves Valves Groove x Groove Check Valves 18-460 Single check valves are used in Fire Protection Systems to allow water flow in one direction only. Typical applications are: · At connections between public water supplies and private fire services systems · At the discharges from fire pumps · At gravity tank connections · At fire department pumper connections Designed for use in piping systems where it is necessary to permit flow in one direction and prevent flow in the opposite direction. Supplied with a ½" NPT tapped boss below the clapper. Boss above the clapper may be tapped for the addition of a ½" NPT drain. · Brass · For horizontal and vertical installation · U/L listed and FM Approved · For use up to 250 PSI working pressure Dixon Powhatan Description Part # Part # 4" groove x 4" groove SCVV400 18-460-00005 4" male NPT x 4" female NPT SCMF400 18-460-00003 1-12 Dixon Powhatan 2007 Groove x Groove Check Valves