1-1/2" Male Pipe Thread, Plastic Inline Sump Check Valve, Connects Directly Into Sump Pump Discharge, Constructed From Durable Thermoplastic Material, For Permanent Installation, 1-1/2" PVC Slip Coupler Can Be PVC Welded Directly To Check Valve, For Temporary Installation, Flexible Discharge Hose Can Be Clamped To The 1-1/4" Barbs.