The 2-Way Hands-Free Mixing Station is a foot-lever-activated venturi chemical proportioner that accurately dilutes chemicals to the required ratios and dispenses into any size container. When one of the foot levers is depressed, this system uses city water pressure (25 - 125 PSI) to draw and blend chemical concentrate into the water stream. The dilution ratio for each valve is set using the included precision metering tips. Choose a factory-set flow rate for each ball valve at the time of order (Bottle Fill, Low Flow or High Flow).