Cresline Plastic Pipe Co., Inc. is the oldest privately-owned plastic pipe company operating today. The Cresline Team is comprised of the industry's most experienced professionals who are the backbone of our success. As one of the largest full-line pipe manufacturers, Cresline's family of companies offers industry leading coast-to-coast service, providing high-quality, American-made polyethylene, PVC, and FlowGuard Gold CPVC pipe to the plumbing, irrigation, water well, hardware, industrial, and municipal markets.