Trap Standard, Threaded 3 in. Inside for Cast Iron Service SinkAt American Standard, it all begins with our unmatched legacy of quality and innovation that has lasted for more than 130 years. It is this tradition of quality and innovation that puts us in three out of five homes in America, as well as, countless hotels, airports, and stadiums. We provide the style and performance that fit perfectly into life, wherever that may be. P trap with strainer Outlet to wall Threaded 3 in. inside for cast iron service