This 4 in. Polyethylene DWV Snap End Cap features durable and economical construction. That's ideal for terminating a run of single-wall drainage pipe. 1-piece, molded polyethylene construction is durable and economical. 1-piece, molded polyethylene construction is durable and economical. Use to terminate a run of 4 in. D single-wall drainage pipe (not included). Integral cleats make end cap connections a snap. Maximum working temperature of 180°F. Rated for soil drains. Fits over the outside of 4 in. corrugated flex drain pipe.