Amazon.com: 1CAMO 3-Way Tee PVC Fittings for 1 Inch PVC Pipe, SCH 40, White - 1 Inch PVC Elbow Fittings PVC Pipe Connectors - Build Heavy Duty Furniture with 1 Inch PVC
BioTek Marine Furniture Grade Colored 1 1/2" PVC 3 Way
PVC Three-Way Branch Connectors - Lee Valley Tools