1-1/2 inch Union Valterra Products $8.99 1-1/2" Slip x Slip Union. Used for disconnecting purposes. For example glue a union on both sides of an ultraviolet sterilizer or external pump that you will be removing in the winter.
1-1/2" Rubber Coupling $8.99 Rubber fittings allow easy removal by loosening the clamp. 1-1/2" Rubber Coupling for joining 2 sections of 1-1/2" PVC
1-1/2" Rubber Cap $4.99 Rubber fittings allow easy removal by loosening the clamp. 1-1/2" Rubber Cap closes off an open end of 1-1/2" PVC
1-1/2" Rubber Tee $13.99 Rubber fittings allow easy removal by loosening the clamp. 1-1/2" Rubber Tee accepts 1-1/2" PVC on all 3 ports