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Formufit 1 in. Furniture Grade PVC 3-Way Elbow in White (4-Pack) F0013WE-WH-4 - The Home Depot
10PCS 3 Way Pipe Fittings PVC Plastic Right Angle Tee Corner Connector 20mm Inner Diameter for Water Pipes Greenhouse Joints and Tents (White) - Amazon.com
PVC 3-Way Elbow 20mm-50mm ID Pressure Water Pipe Connector Adapter Connector | eBay
1/2 in. 3-Way Elbow PVC Fitting (Box of 100) — FORMUFIT Direct
Plastic Hose Connector Y Tee Type Push to Connect 3 Ports Pneumatic Fittings Plastic 3 Way Air Hose Tube Connectors Py - China 3 Way Tube Conncector, Y Type Tube Connector | Made-in-China.com
3-Way Connectors by EZTube - EZTube | Easy to Assemble Aluminum Framing System