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) :
Uxcell 3/4 Inch UPVC Elbow Fitting 6 Way PVC Pipe Fittings Connector Furniture Pipe Joint 3 Pack - Walmart.com
Value Collection - 3/4″ PVC Plastic Pipe Male Adapter - 36999357 - MSC Industrial Supply
Homewerks Worldwide 3/4-in Schedule 40 PVC Union in the PVC Pipe & Fittings department at Lowes.com