Amazon.com: FangKingNo10pcs 1/2" White PVC Pipe Coupling Adapter Pipe Fittings (Slip to Slip) Schedule 40 Easy to Install,and High Tensile for Home or Industrial Use (1 Pack of 10pcs) : Industrial &
10 x 6" PVC Duct Reducer Coupling 1034-RC-1006
Charlotte Pipe 6 in. x 4 in. PVC Schedule 80 S x S Reducer Coupling PVC 08100 7600 - The Home Depot
6" Schedule 80 PVC Couplings, 829-060
Charlotte Pipe 6-in PVC DWV Coupling in the PVC DWV Pipe & Fittings department at Lowes.com
Coupling, 6 in, Slip x Slip: Pipe Fittings: Amazon.com: Tools & Home Improvement
NDS 6-in PVC Sewer and Drain Coupling in the Sewage Pipe & Fittings department at Lowes.com
Charlotte Pipe 3-in PVC DWV Repair Coupling in the PVC DWV Pipe & Fittings department at Lowes.com