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This 2 1/2 to 10 inch metal air gap drain is installed under a reduced pressure assembly, series 825YD, to catch minor relief valve discharge due to pressure fluctuations and/or minor check valve fouling. This drain reduces the amount of water splashing in the area around reduced pressure assemblies while funneling relief valve discharge into the drain.
FEBCO 905083 AGD-L AIR GAP DRAIN KIT 2-1/2TO 10 DURA CHECK