9 Electronic controllers for use in measuring, initiating, and controlling regeneration and backwash cycles for water treatment equipment; control valves for regulating the flow of water in water treatment systems; control valves for regulating the flow of water in water conditioning and water filtration equipment; water treatment systems comprised of meters, timers, brine valves, air check valves, reverse osmosis filters, control valves, housings therefor, and parts therefor; electrical control apparatus for controlling valves in fluid handling and fluid treatment systems, namely, electro-mechanical cycle timers, electro-mechanical pilot valve controllers, and electronic programmable time controllers; electronic water hardness sensing controls, namely, sensors; meters for measuring rate of flow of fluids; water meters; automatic control valves for fluid handling and fluid treatment systems, namely, electric motor operated valves, diaphragm operated valves, solenoid operated valves, pressure regulating valves, and check valves; water-treating apparatus, namely, water meters, timers, and control valves for regulating the flow of water in water treatment systems and parts therefor; water meter controls for water treatment systems