10 Pcs Three Port L Shape Lean Pipe Clamp, Fit 1.1 inch (28mm) OD Lean Tube, Thickness 2.3mm, Steel Metal 90 Degree Joint Pipe Clamp Connector, for Lean Workstation, Shelves - Amazon.com
1/2 in. 3-Way Elbow PVC Fitting (Box of 100) — FORMUFIT Direct
Black 1/2" 3/4" 1" Thread to 20/25/32mm HDPE Pipe Connector PE PVC Irrigation Tube Tee Connector 3-Way Conversion Locked Joint - AliExpress
1" Black 4-Way Side Outlet Tee, Home TZH 10-Pack 4-Way Corner Cast Black Malleable Iron Pipe Fitting for Industrial Pipe, Furniture and DIY Decoration (10, Black 1 Inch) - Amazon.com