Amazon.com: FangKingNo 10pcs 1" White PVC Pipe Coupling Adapter Pipe Fittings Slip (Socket x Socket) Schedule 40 Easy to Install,and High Tensile for Home or Industrial Use (1 Pack of 10pcs) (1
10Pack 1-1/2" PVC Pipe Coupling Adapter Pipe Fittings (Socket x Socket) Contractor Pack Schedule 40 Heavy Duty 1.50 Inch PVC Slip Socket Connectors for DIY PVC Shelf Garden Support Structure, White - Amazon.com
Apollo 1 in. x 1 in. PVC Slide Repair Coupling PVCC1SL - The Home Depot
1 Inch Coupling, Slip Socket - Schedule 40 - 429-010
Homewerks Worldwide 1 in. PVC Compression Coupling 511-43-1-1H - The Home Depot