Patent ID: 7393450

Claim:
A system for automatically maintaining at least one of a pH level and a sanitizing agent level of water in a water feature, the system fluidly coupled to the water feature, the system comprising: a sensor assembly fluidly coupled to the water feature, the sensor assembly responsive to at least one of a pH level of the water and a sanitizing agent level of the water, the sensor assembly responsive to the pH level by generating a pH signal corresponding to the pH level, the sensor assembly responsive to the sanitizing agent level of the water by generating a sanitization signal corresponding to the sanitizing agent level; a controller operatively coupled to the sensor assembly, the controller generating control signals in response to at least one of the pH signal and the sanitization signal; at least one of a first source and a second source, the first source comprising a first valve assembly and a first container containing an sanitizing agent material, the first valve assembly fluidly coupled to selectively allow water from the water feature and selectively allow fluid from the first container to flow through the sensor assembly to the water feature and responsive to at least a portion of the control signals from the controller by selectively allowing the sanitizing agent material to flow from the first container to the water feature, the second source comprising a second valve assembly and a second container containing a pH-modifying material, the second valve assembly fluidly coupled to selectively allow water from the water feature and selectively allow fluid from the second container to flow through the sensor assembly to the water feature and responsive to at least a portion of the control signals from the controller by selectively allowing the pH-modifying material to flow from the second container to the water feature; and a third source comprising a third valve assembly and a third container containing a liquid calibrant material, the third valve assembly responsive to at least a portion of the control signals from the controller to selectively switch between a first state in which the third valve assembly allows the calibrant material to flow from the third container through the sensor assembly to the water feature and a second state in which the third valve assembly allows water to flow from water feature through the sensor assembly.