Flex-drain 50310 flexible/expandable landscaping drain pipe, perforated, 25-foot a pipe with spaced slits, appropriate for ground water drainage (french drains, dispersing water from flower beds) in applications where surrounding soil is coarse enough not to pose a clogging threat and/or surrounding debris is minimal. Works effortlessly with our complete system of connectors, couplers and adaptors. Exceeds all applicable astm standards. Made with no-break copolymers for professional grade strength and integrity. Proprietary peak and valley design offers greater surface area and a 30-percent higher load-bearing rating than standard corrugated pipe. Guaranteed not to split, crack or break when used in accordance with local building codes. Flex-drain is compatible with virtually all traditional 3-inch and 4-inch corrugated pipe and 4-inch pvc. All flex-drain products are made in america.