Striving to earn your business since our inception in 1981, Co-Ex Pipe Company continues to manufacture quality polyethylene pipe in sizes from 1" to 12" OD. All our pressure pipe is produced in the U.S.A. from 4710 material and in accordance with ASTM Specifications. Polyethylene pipe is ideal for a variety of industries including oil field, ranching, and farming applications as well as irrigation, water well and other agricultural needs.