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A dilution control device and method of operating the same. The dilution control device can include a structure for dispensing concentrate and diluent fluid in a desired dilution ratio utilizing volumetric dosing. In some embodiments, diluent fluid drives a wheel or compresses a pliable concentrate

A dilution control device and method of operating the same. The dilution control device can include a structure for dispensing concentrate and diluent fluid in a desired dilution ratio utilizing volumetric dosing. In some embodiments, diluent fluid drives a wheel or compresses a pliable concentrate bag in order to dispense concentrate in the desired ratio with the diluent fluid. In some embodiments, one or more floats can be used to drive a pump or actuate a valve to dispense concentrate at a particular rate proportional with the flow rate of the diluent fluid. In some embodiments, a rocker is responsive to the flow of diluent fluid to pump concentrate. In some embodiments, the dilution control device can be operable to automatically modulate the dispense rate of concentrate when the diluent fluid flow rate is varied in order to maintain a predetermined dilution ratio.

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1. A chemical dispensing apparatus comprising: a housing within which extends a fluid passageway adapted to receive a diluent from a diluent source, the housing defining an area accumulating diluent, the diluent exiting the area under force of gravity;a wheel coupled to the housing and in fluid comm

1. A chemical dispensing apparatus comprising: a housing within which extends a fluid passageway adapted to receive a diluent from a diluent source, the housing defining an area accumulating diluent, the diluent exiting the area under force of gravity;a wheel coupled to the housing and in fluid communication with the area, the wheel driven by the gravitational force of diluent flowing from the area;a shaft coupled to the housing and the wheel, wherein the shaft is adapted to rotate with the wheel; anda pump coupled to the housing and the shaft, wherein the pump is in fluid communication with a reservoir containing a concentrated chemical and wherein the pump is actuated by rotation of the shaft to deliver concentrated chemical to diluent flowing from the area,wherein the diluent and the concentrated chemical are dispensed from the housing only by gravitational force, andwherein the wheel, the shaft, and the pump are located within and enclosed by the housing, and together with the housing define an integrated and portable unit. 2. The chemical dispensing apparatus of claim 1, further comprising a conduit at least partially positioned in the housing to deliver the concentrated chemical from the pump to diluent passing from the area. 3. The chemical dispensing apparatus of claim 2, wherein the conduit is positioned to deliver the concentrated chemical to the wheel to allow the concentrated chemical to be mixed with the diluent in the wheel. 4. The chemical dispensing apparatus of claim 1, further comprising a set of gears coupled to the housing and positioned to provide power from the shaft to the pump. 5. The chemical dispensing apparatus of claim 4, wherein the set of gears includes a gear ratio that is selected to provide a predetermined dilution ratio. 6. The chemical dispensing apparatus of claim 1, wherein the pump is a positive displacement pump. 7. The chemical dispensing apparatus of claim 6, wherein the positive displacement pump is a gear pump. 8. The chemical dispensing apparatus of claim 1, wherein the pump is dimensioned and configured to deliver a predetermined amount of concentrated chemical to the diluent per each rotation of the wheel. 9. The chemical dispensing apparatus of claim 1, wherein the housing further comprises a funnel along the fluid passageway, upstream from the wheel, and wherein the funnel gathers diluent without connection to a source of diluent and directs the diluent to the wheel. 10. The chemical dispensing apparatus of claim 1, wherein the fluid passageway defines at least a portion of the area from which diluent flows by gravity. 11. The chemical dispensing apparatus of claim 1, wherein a portion of the portable unit engages a portion of a wall of a vessel upon which the portable unit is supported, the portable unit is movable relative to and removable from the portion of the wall of the vessel, and the portable unit is provided between a source of the diluent and the vessel. 12. The chemical dispensing apparatus of claim 1, wherein the conduit delivers the concentrated chemical directly to the wheel prior to introduction of diluent to the wheel. 13. A chemical dispensing apparatus comprising: a housing within which extends a fluid passageway adapted to receive a diluent from a diluent source;a concentrated chemical reservoir located within and integral to the housing, at least partially defining a chamber enclosed within the housing, and adapted to retain a quantity of concentrated chemical, wherein the chamber is inaccessible to a user from outside of the housing;a wheel coupled to the housing and in fluid communication with the fluid passageway, the wheel driven by the impact or weight of diluent flowing through the fluid passageway; anda shaft coupled to the housing and the wheel and adapted to rotate in response to rotation of the wheel, the shaft positioned within an aperture of the concentrated chemical reservoir and adapted to selectively dispense concentrated chemical from the reservoir via rotation of the shaft,wherein the housing, the wheel, and the reservoir define a portable unit movable to different positions relative to the diluent source, the portable unit also movable relative to and removable from a wall of a vessel upon which the portable unit is supported. 14. The chemical dispensing apparatus of claim 13, wherein the shaft is a first shaft and the chemical dispensing apparatus further comprises a second shaft and a set of gears, wherein the second shaft is directly coupled to the wheel and adapted to rotate with the wheel, the set of gears are positioned to provide power from the second shaft to the first shaft. 15. The chemical dispensing apparatus of claim 14, wherein the set of gears includes a gear ratio that is selected to provide a predetermined dilution ratio. 16. The chemical dispensing apparatus of claim 13, wherein the shaft includes a rotary metering device in communication with the aperture of the concentrated chemical reservoir, wherein rotation of the shaft causes the rotary metering device to dispense concentrated chemical from the reservoir. 17. The chemical dispensing apparatus of claim 16, wherein the rotary metering device comprises a flatted portion of the shaft in selective communication with the aperture of the concentrated chemical reservoir, rotation of the flattened portion adjacent the aperture provides metered dispensing of a concentrated chemical in the chemical reservoir. 18. The chemical dispensing apparatus of claim 16, wherein the rotary metering device comprises a disc coupled to the shaft and having at least one aperture for receiving concentrated chemical when in communication with the concentrated chemical. 19. The chemical dispensing apparatus of claim 13, wherein the housing further comprises a funnel along the fluid passageway, upstream from the wheel, and wherein the funnel gathers water from a free flowing source of diluent and directs the diluent to the wheel. 20. A method for proportionately mixing a concentrated chemical with a diluent, the method comprising: delivering a diluent to a fluid passageway extending within a housing;accumulating diluent in an area defined by the housing, the diluent exiting the area under force of gravity;rotating a wheel that is coupled to the housing and in fluid communication with the area by the gravitational force of diluent acting on the wheel;operating a pump coupled to the housing via rotation of the wheel, wherein the pump is in fluid communication with a reservoir containing a concentrated chemical and operation of the pump is proportional to the rotation of the wheel, wherein the wheel and pump are located within and enclosed by the housing, and together with the housing define an integrated and portable unit;drawing concentrated chemical from the reservoir in response to operating the pump;delivering the concentrated chemical to the diluent; anddispensing the diluent and the concentrated chemical from the housing only by gravitational force. 21. The method of claim 20, wherein the concentrated chemical is delivered to the wheel and further comprising mixing the diluent and concentrated chemical in the wheel. 22. The method of claim 21, further comprising generating a foam in response to mixing the concentrated chemical and the diluent in the wheel. 23. The method of claim 20, further comprising: operating a generator with the wheel;generating electricity with the generator; andpowering the pump with the electricity. 24. The method of claim 23, further comprising: rotating a shaft coupled to the wheel;rotating a set of gears in response to rotation of the shaft, wherein rotation of the gears operates the pump. 25. The method of claim 20, wherein the fluid passageway defines at least a portion of the area from which diluent flows by gravity. 26. A method for proportionately mixing a concentrated chemical with a diluent, the method comprising: delivering a diluent to a fluid passageway of a housing;rotating a wheel that is coupled to the housing and in fluid communication with the fluid passageway via the impact or weight of diluent on the wheel;rotating a shaft coupled to the wheel in response to rotating the wheel, wherein the shaft includes a rotary metering device coupled to the shaft, the rotary metering device being positioned in a selectively blocking position of an aperture positioned in a concentrated chemical reservoir integral with the housing, wherein the concentrated chemical reservoir holds a quantity of concentrated chemical enclosed within the housing and inaccessible to a user from outside of the housing;selectively dispensing concentrated chemical from the reservoir in response to rotation of the shaft and the rotary metering device; anddelivering the dispensed concentrated chemical to the diluent,wherein the housing, the wheel, and the reservoir define a portable unit movable to different positions relative to a diluent source, the portable unit also movable relative to and removable from a wall of a vessel upon which the portable unit is supported.