Amazon.com: Straight 2" PVC Coupling : Tools & Home Improvement
Straight PVC Coupling Connector Fish Tank Aquarium Tube Pipe Joiner 16mm-125mm | eBay
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) :