Homewerks Worldwide 3/4 in. PVC Compression Coupling 511-43-34-34H - The Home Depot
Amazon.com: Midline Valve PVC Union Coupling Pipe Fitting 3/4'' FIP White Plastic (592DV034) : Industrial & Scientific
Charlotte Pipe 1 in. x 3/4 in. PVC Coupling PVC 02100 3600 - The Home Depot
Cantex 3/4 in. PVC Couplings (15-Pack) R6141624M - The Home Depot
PVC Male Adapter Pipe Fitting - SCH 40 PVC Fittings 3/4 Inch MNPT x 1 Inch Slip Socket PVC Connectors - PVC Pipe Connectors for Plumbing Water Line – Male Adapter Fitting - Amazon.com