Amazon.com: FangKingNo 10pcs 1" White PVC Pipe Coupling Adapter Pipe Fittings Slip (Socket x Socket) Schedule 40 Easy to Install,and High Tensile for Home or Industrial Use (1 Pack of 10pcs) (1
Rainbow Dream 1 Inch PVC Coupling Adapter Pipe Fitting (Socket x Socket) - 10 Pack, White - Amazon.com
1 in x 1 in Fitting Pipe Size, Schedule 40, Coupling - 22FJ46|429010BC - Grainger
Charlotte Pipe 1-in Schedule 40 PVC Couplings (10-Pack) in the PVC Pipe & Fittings department at Lowes.com