Tucson Hydrocontrols was started in 1987 manufacturing products such as Check, Pilot Check and Overcentre Valves, Relief, Sequence, Unloading and Pressure Reducing Valves, Throttle and Flow Control Valves in cartridge type, Shut Off Valves, Ball valves, Accumulator Safety blocks as well as Modular, stackable valves currently form the Tucson product line. Accessories such as Minimess Hoses and Couplings, Gear Couplings and Pressure Switches are also a part of the product range. Tucson also provides a one-to-one replacement option to its customers for valves manufactured by many of the world's leading cartridge valve companies.