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") :
Premier Mounts Pipe-to-Pipe Coupler (1.5 NPT) PVCPLR