Sump Pump Check Valve Reducer Sleeve (asc 150srs) 1-1/2"MPT x 1-1/2" / 1-1/4" 1-1/2"MPT inlet threads into sump pump Rubber coupling adapts to 1- 1/2" or 1-1/4" piping Includes stainless hose clamps Durable Delrin construction