4 Inch PVC Sewer & Drain Female Adapter | PlumbersStock
Amazon.com : NDS 3P12 3-Inch by 4-Inch PVC Adaptor with Drain Waste Vent to Sewer and Drain Connection, White : Pipe Fittings : Tools & Home Improvement
4" x 3" x 2" Corrugated Drain Tile Downspout Adapter at Menards®
NDS 3 in and 4 in Pop-Up Drainage Emitters 4-in L x 5-1/4-in W x 3-in or 4-in dia Adapter in the Outdoor Drainage Accessories department at Lowes.com
PVC Sewer and Drain Female Cleanout Adapter, 4 in. Hub X FPT in the Sewage Pipe & Fittings department at Lowes.com