Amazon.com: JoyTube 3/4” Female PVC Bulkhead Fitting with Plug Silicon Seal Gasket Water Tank Connector for 1-3/8 Inch or 1-1/2 Inch Hole Saw Rain Barrels, Aquariums (pack of 2) : Automotive
Charlotte Pipe 3 in. x 3 in. PVC DWV Cleanout Plug PVC001061000HD - The Home Depot