Fewer parts than other softener valves. Single motor provides all the power to turn camshaft - no solenoids are needed! Unique camshaft / flapper valve design - no dynamic seals (such as piston and seal or rotary discs) that could cause leakage through wear or fatigue. Built-in brine control valve - no external brine float needed! Direct acting system functions independent of water pressure. No pistons or diaphragms that require a minimum water pressure to operate. Valve may be indexed manually without power in the event of an extended power outage. True 3/4" internal porting - many competitors use restrictive 1/2" internal ports!