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
BMI USA Steel Pipe Coupling 1-STEEL-COUPLING Hydraulic Supply Co.
Amazon.com: Reducing Coupling Brass Pipe Fittings 1 inch female x 1" inch female Threaded Brass Construction NPT : Industrial & Scientific
304 Stainless Steel, 1 in x 1 in Fitting Pipe Size, Drop Coupling - 60WL16|29DC14010 - Grainger
Oldham Chemical Company. Couplings Company 119FC Reducer Pipe Coupling - 1/2 in. x 1/4 in.
Charlotte Pipe 1-in Schedule 40 PVC Couplings (10-Pack) in the PVC Pipe & Fittings department at Lowes.com
1" X 1/2" Stainless Steel Threaded Reducing Coupling
Pipe Fitting Malleable Galvanized Iron Coupling 1" - ARGCO.COM