Advanced Drainage Systems Corrugated Perforated Drain Pipe, 4 In. x 100 Ft. is the for pipe-and-gravel leaching field systems. This heavy-duty single-wall polyethylene pipe is built to meet the demanding needs of drainage applications and remains a preferred option for gravel absorption systems. Made from high-density polyethylene, the corrugated design ensures exceptional durability and strength, making it i for underground installations. It efficiently distributes water into the surrounding gravel, promoting proper drainage and preventing waterlogging, which helps maintain the health and functionality of your drainage system. Model Number: 401-100