2 inch Swimming Pool Vacuum Line - Male Thread-to-Hose Connection
RIDGID Hose and Accessory Adapter Kit for RIDGID Wet/Dry Shop Vacuums VT1755 - The Home Depot
Amazon.com: Vacuum Cleaner Adapter 35mm (1-3/8 Inch) to 31 mm (1-1/4 Inch) for Inner Diameter 32 mm Brush Fit to Outer Diameter 35 mm Tube Plastic Vacuum Hose Adapter(2 Pieces): Home & Kitchen
U.S. Pool Supply 1-1/4" or 1-1/2" Hose Coupling Connector Adapter - Connect Swimming Pool Vacuum Hoses, Spa, Cleaners or Filter Pump Hoses - Durable Plastic Repair Fitting, Pool Maintenance - Walmart.com