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Smith No. 3130 cast iron 12” square, 10” deep receptor with acid resistant coated interior and extra thick nickel bronze rim and top grate. Aluminum dome bottom strainer. Smith No. 3130 (-13) for three-quarter grate. Flashing clamp in membrane floors.
Smith No. 3131 (-19) cast iron 12” square, 10” deep receptor with acid resistant coated interior and nickel bronze rim and hinged top grate with 1/4” stainless steel mesh lined aluminum sediment bucket. The ported sediment bucket catches all solids yet provides ample drainage. Flashing clamp in membrane floor.