Autotrol 255 Series Valve 3/4" Timer W/A.C., 440 6-day w/X-Salt Long Rinse

The 255 valve's direct-acting system operates independently of water pressure, pistons or diaphragms. These controls include rugged Noryl valve bodies with easy access valve discs that are held closed by water pressure. The injector, injector screen, backwash and brine controls are also easily accessible. A simple locking bar makes removal from the mineral tank effortless. The 440i and 940 timers are dependable and easy to set. A six-day clock is standard on the 440i timer. A 12-day clock is standard on the 940 timer. Includes a Sight Glass Air Check.