Patent ID: 8500999

Claim:
A water treatment system for removing at least one of iron, sulfide, and manganese from water, the water treatment system comprising: a tank including an air head; a head portion coupled to the tank and including fluid ports; a valve assembly in the head portion including a piston assembly positioned inside a spacer assembly, the valve assembly coupled to an injector assembly, the injector assembly configured and arranged to enable atmospheric air at atmospheric pressure to enter the injector assembly and the valve assembly; a powerhead in the head portion, the powerhead including an encoder, a controller, an optical sensor, and a motor; the encoder coupled to the piston assembly and powered by the motor to control a position of the piston assembly inside the spacer assembly to provide; a service state in which the air head is pressurized by addition of untreated water and wherein at least one of iron, sulfide, and manganese are removed from the water; a first air bleed state in which a first amount of deoxygenated air is released from the tank; a second air bleed state in which a second amount of deoxygenated air is released from the tank, the second amount being larger than the first amount; and wherein upon completion of the second air bleed state the air head is substantially unpressurized and at substantially atmospheric pressure; a backwash state; and an air draw state, the air draw state comprising drawing atmospheric air at atmospheric pressure; wherein the optical sensor is electrically connected to the controller to communicate the position of the piston assembly inside the spacer assembly.