2 1/2" PVC Expansion Repair Coupling (White) (S x Sp) - The Drainage Source
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") :
Lasco 1.5 inch Coupler - Slip x Slip - Par West Turf
DYNASTY SPA PVC 1 1/2 INCH SLIP PVC COUPLING | The Spa Works