Since 1976, Agri Drain has been America's most complete supplier of products for drainage water management, sub-irrigation, wetlands, ponds, lakes, erosion control, and land improvement. Agri Drain Corp. offers the best guarantee in America. It’s Simple….We take care of our customers! You must be completely satisfied with every Agri Drain manufactured product that you order from us. If there's ever a problem, we'll solve it immediately with replacement, full credit, or a refund for 5 full years unless otherwise stated. If there's something you don't want, we'll have it picked up and we'll pay the freight. Custom or non standard items built to your specifications carry a 1 year warranty on material and workmanship and are non returnable. See website warranty page for full details. http://www.agridrain.com/warranty.htm Committed to Customer Service Since 1976!