Drain trap

摘要

A drain trap for a plumbing drainage system includes a drain pipe having an inlet end for fluid-connection to an area to be drained of liquid, and a discharge end. A drain cup is provided which includes a bottom wall and a side wall joined to the bottom wall. The side wall defines an open upper end which surrounds the discharge end of the drain pipe and is positioned within a portion of the drain cup to establish therebetween an annulus space to allow liquid flowing through the drain pipe to fill the drain cup and then overflow into plumbing associated with the drainage system. At least one pair of radially extending lugs are provided which are circumferentially spaced apart from one another about the drain pipe. The lugs are joined rigidly to both the drain pipe and the side wall of the drain cup to form an integral structure.