FLEX-Drain helps you get the job done faster and easier, with professional grade durability and more versatility than traditional corrugated pipe. Flexible and expandable, FLEX-Drain easily bends around any obstacle, holds its shape during installation and with a simple snap, its integrated soil-tight fittings lock securely and stay connected during back-filling. Taping joints is not necessary. More than just pipe, FLEX-Drain is a complete drainage solution system that's widely compatible with virtually all traditional 2 in. and 3 in. corrugated pipe and 4 in. PVC. Technologically superior, it's made with no-break copolymers and exceeds all applicable ASTM crush standards. Connects a 3 in x 4 in elbow or downspout to 3 inch or 4 inch corrugated pipe and 4 inch PVC pipe. The flexibility allows an easier connection with more versatility than rigid adapters.