1-1/2" Merchant Steel Coupling, Sch. 40 Galvanized Pipe Fitting, Class 150 - GP130112 - Hi-Line Inc.
Fernco Proflex 1-1/2 in. Neoprene Shielded Coupling P3001-150 - The Home Depot
304 Stainless Steel, 1 in x 1 in Fitting Pipe Size, Coupling - 2UA53|4307000064 - Grainger
Dura Plastics 1-in PVC Sch 40 Coupling for Irrigation Repairs - Flexible & Versatile - Outdoor Landscape Use - Potable Water Compatible in the PVC Pipe & Fittings department at Lowes.com
Halex 1 in. Rigid Conduit Coupling 64010 - The Home Depot
Homewerks Worldwide 1-1/4-in Schedule 40 PVC Coupling in the PVC Pipe & Fittings department at Lowes.com