PVC REDUCER COUPLING 3/4" FEMALE SLIP X 1/2" FPT SCHEDULE 40 - Northeast Agri Systems
Amazon.com: FangKingNo10pcs 3/4" White PVC Pipe Coupling Adapter Pipe Fittings (Slip to Slip) Schedule 40 Easy to Install,and High Tensile for Home or Industrial Use (1 Pack of 10pcs) (0.75 Inch) :
Charlotte Pipe 4-in PVC DWV Repair Coupling in the PVC DWV Pipe & Fittings department at Lowes.com