The innovator of the Dual Plate Check valve

Duo-Chek manufacturing was initiated in 1955. During 1986 Stockham purchased the company and registered themselves as Stockham Valve Limited. This acquisition combined all the experience and expertise of the Duo-Chek and Marlin check valves, which is incorporated into our current Duo-Chek II valve offering. Over a period of 40 years, the Duo-Chek valve has undergone three major redesigns and updates.

Leading engineering contractors specify the Duo-Chek II for check valve applications because it provides high performance. The combination of extensive research, testing and demonstrated performance has earned worldwide recognition, unmatched in the industry.

Duo-Chek II also offers special design features like scrub-free opening, independent spring design, and independent plate support. These features may not be found in other check valves.