Geodesic 6-Way 1" or 1-1/2" Geodesic hub for PVC Domes: Amazon.com: Tools & Home Improvement
Plumbing PVC Fitting Socket Saver, PVC Pipe Reamer Cutter for Removing SCH 40 from Hub, Fits 1/2" Variable Speed Power Drill, Bit Socket Saver Inside for ABS PVC Pipe (1 Inch) - Amazon.com
2" Hub PVC DWV Wye & 45 Degree Elbow - Amazon.com
Amazon.com: Cantex 5133720 Box Adapter, 2 in Conduit, PVC, 1-9/16 in L : Sports & Outdoors
Charlotte Pipe Schedule 40 2 in. Hub x 2 in. Dia. FPT PVC Pipe Adapter - Amazon.com
NDS 6P04 PVC 22.5-Degree Elbow, 6-Inch, for Hub X Hub Solvent-Weld Connections, for Use with 6-Inch Sewer and Drain Pipe, White: Amazon.com: Industrial & Scientific