20 Pack 1/2" PVC Pipe Coupling Adapter Pipe Fitting Connector (Socket x Socket), Furniture Build Grade SCH40 1/2 Inch PVC Pipe Slip Socket Connectors for Home or Industrial Use, White - Amazon.com
2-1/2 inch x 2 inch PVC Schedule 40 Reducer Coupling - Amazon.com
Amazon.com: letsFix 1-1/2" PVC Fittings 3 Way (4-Pack), 1.5" PVC Pipe Connector PVC Elbow - Heavy Duty Furniture Grade 3 Way PVC Fittings for All DIY PVC Structure and Frames, Fits 1-1/2"
PVC Coupling 1.5" Slip x 1.5" Slip
Amazon.com: FangKingNo10pcs 1/2" 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) : Industrial &