Homewerks Worldwide 1-1/4-in Schedule 40 PVC Coupling in the PVC Pipe & Fittings department at Lowes.com
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) :