Warren Rupp, Inc., a Unit of IDEX Corporation, pioneered the design and manufacture of air-operated, double diaphragm pumps. MARATHON diaphragm pumps are driven by compressed air. The directional air distribution valve and pilot valve, referred to as the "air end," are located in the center section of the pump. Liquid moves through two manifolds and outer chambers of the pump, referred to as the "wet end." Generally, check valves (ball-type or flap-type) are located at the top and bottom of each outer chamber or on a common manifold. 

We can supply Marathon air operated double diaphragm pumps and repair kits at very competitive prices.