2~15PCS 16mm White PVC Pipe Fittings Straight Elbow Solid Equal Tee Connectors Irrigation Water Parts PVC Water Pipe Fittings - AliExpress
eoere 8 Sets 4 Way Structural Pipe Connector, Metal Clamp Fittings, Fit for 1"(O.D. 25.4 mm) Stainless Steel Pipe (Doesn't fit US 1" Electrical-Metallic Tubing) - Amazon.com