RED HEAVY DUTY VINYL POST TO PIPE ADAPTER DONUT 2 3/8" X 5" X 5" - SWi Fence & Supply
Charlotte Pipe 1-1/2-in x 1-1/4-in PVC DWV Reducing Male Trap Adapter in the PVC DWV Pipe & Fittings department at Lowes.com
1/2 to 3/8 Reducer Faucet Adapter - Compression Brass Pipe Fitting, 3/8 Male to 1/2 Male Supply Line Adapter for RV Kitchen Plumbing, Water Hose Pipe Connector with Rubber Washer, (2 Pack) - - Amazon.com
Charlotte Pipe 1 in. x 3/4 in. PVC Schedule 40 MPT x S Male Reducer Adapter PVC021100800HD - The Home Depot