Amazon.com: PVC Bulkhead Fitting Double Threaded Bulkhead Water Tank Connector for Rain Barrels, Aquariums, Water Tanks, Tubs, Pools, Spigot, Black, 3/4 Inch Male 1/2 Inch Female (4 Pieces) : Industrial & Scientific
927072-3 316 Stainless Steel Bulkhead Tank Fitting, 1-1/2" Pipe Size, FNPT x FNPT Connection Type | Imperial Supplies
PVC Bulkhead Tank Fitting with Hose Adapter - China PVC Bulkhead Tank Fitting, PVC Plug Cap | Made-in-China.com