Charlotte Pipe 3/4 in. x 1/2 in. PVC Schedule 40 Reducer Bushing PVC 02112 1600HD - The Home Depot
3/4 thread schedule 40 pvc pipe for drink water from China Manufacturer - Taizhou Zhuoxin Plastics Co., Ltd.
1/2 3/4~2 Inch Pvc Ball Valve Female Thread Pvc Pipe Valves Aquarium Fish Tank Water Pipe Fittings Garden Water Connector - Garden Water Connectors - AliExpress