NDS PVC S&D Increaser/Reducer Coupling, 3 in. Hub X 4 in. Hub 4P07 - The Home Depot
PVC Coupling, FNPT x FNPT, 3/4" x 1/2" Pipe Size - 1 Each: Lawn And Garden Sprinklers: Amazon.com: Industrial & Scientific
3/4 x 1/2 SCH80 PVC Reducer Coupling (Soc)
Charlotte Pipe 4 in. x 3 in. PVC DWV Adapter Coupling PVC001170800HD - The Home Depot
Amazon.com: White fittings 3/4 Inch Slip Socket x 1/2 Inch Slip Socket PVC Socket Coupling Adapter Pipe Fitting Sch 40 PVC Pipe Reducing Coupling Connectors for Home Sewer Plumbing Water Line :
Charlotte Pipe 3/4 in. x 1/2 in. PVC Schedule 40 Degree S x S Reducer Coupling PVC 02100 3400HD - The Home Depot
NIBCO 430-073 1/2" x 3/8" PVC Sch 40 Coupling L805100
GF+ 1-1/2" X 3/4" REDUCING COUPLING PVC (829-210)
Amazon.com: FangKingNo 10PCS 1/2" to 3/4" PVC Reducing Nipple Male Thread to Male Thread Coupling for PVC PIPE Pressure Fittings,PVC Male Adapter for PVC PIPE Connector White (1/2 Inch to 3/4 Inch) :