Plumbing · P-PBRM5

Floor Drain Assembly in Concrete Slab with Lead or Copper Flashing

Materials

Elements

Floors / Slabs Waterproofing / Flashing Drainage Connections / Plates

About this detail

An adjustable nickel bronze strainer with a four-inch flange sits flush with the composition flooring surface. The drain body features an invertible flashing collar and weep holes surrounded by loose gravel to prevent clogging. A minimum twenty-four-inch square, two-and-a-half to four-pound lead or sixteen-ounce copper flashing sheet is provided beneath the floor assembly when installed in a non-membrane floor. The annular space around the drain is filled with concrete, grout, or mortar matching the floor thickness, terminating in a caulked, no-hub, or threaded connection as necessary.

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