Pipe Fitting by Types - Types of Pipe Fittings, Thepipefittings.com
Threaded Pipe Fittings and Nipple/Cap/Coupling/Reducer for plumbing
Amazon.com: FangKingNo5pcs 1.5Inch White PVC Pipe Coupling Adapter Pipe Fittings couplers (Slip to Slip) Schedule 40 Easy to Install,and High Tensile for Home or Industrial Use (Pack of 5) (1 1/2") :