Patent ID: 8557126

Claim:
A chemical dispensing apparatus for delivery of a fluid chemical into a water supply line for a water-consuming wastewater treatment device, the apparatus comprising: a set of three interchangeable containers for holding the fluid chemical; and a chemical administering system adapted to vacuum the fluid chemical from one of the three containers into the water supply line for the water-consuming wastewater treatment device, wherein the water-consuming wastewater treatment device stores a mixture of the fluid chemical and water delivered by the water supply line; wherein each of the three interchangeable containers includes a differently sized tube, each tube being adapted to provide a flow path delivering the fluid chemical into the water supply line and to restrict a flow of the chemical, and the three tubes being configured with diameters sized to allow for a concentration of one-half ounce of chemical per gallon water, one-third ounce of chemical per gallon water, and one-quarter ounce of chemical per gallon water, respectively, thereby controlling the amount of chemical administered into the water supply line.