Amazon.com: FangKingNo 10pcs 1/2 Inch White 2-Way PVC Male Adapter Pipe Fittings (Socket x Male Pipe Thread) Coupling with 1/2-Inch Male Thread Schedule 40 -10 Pack (0.5 Inch) : Industrial & Scientific
LASCO 3/4-in Schedule 40 PVC Adapter in the PVC Pipe & Fittings department at Lowes.com
PVC-U Coupling Pressure Pipe Fittings Adhesive x Thread 20-63mm Fish Tank Pond | eBay