The 60/20 High Flow Level Master™ is a water driven chemical proportioner that will automatically refill the 60 gallon tank with ready-to-use chemical solution. When the solution in the tank drops below a pre-set level, the float valve triggers air-activated solenoids to start the water flow. Using city water pressure (35 - 125 PSI), this venturi injection system draws and blends chemical concentrate into the 21.2 GPM @ 40 PSI water stream to create an accurately diluted solution. The system cycles continuously.