About Us

Preform Trench Drain Co. was the original prefabricated galvanized trench drain. In 1968, working with oil company engineers, John Chrien designed and engineered a product that was a cast in place forming system that eliminated the need for hand forming and the use of wood forms to make the trench drain system. A variety of shapes and custom layouts have been developed for a pre-engineered approach. The product is delivered to site, easily setup, assembled and poured in place.