This 4 inch x 12 feet pipe has spaced slits that allow water to drain in stages. It's ideal for ground water drainage like French drains or dispersing water from flower beds. 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 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 3 inch and 4 inch corrugated pipe and 4 inch PVC. Technologically superior, it's made with no-break copolymers and exceeds all applicable ASTM crush standards. Landscaping drain pipeCompatible with most 3" or 4" corrugated pipesPerforations drain the area along the full length of the pipe to discharge at the endInstalls faster- requires 1/5 of the storage and transport spacePerforated pipe has 14% better flow rateAdvanced design for superior performanceOutperforms in freeze and thaw conditionsFlexible and expandable