continues to a supply contactor relay 70 in a central control panel 74 which maintains the pump 30 is activated and the supply pump turns on 0056 fig3 is a flow diagram of the process pump process there is a fill float 44 in the final holding tank 42 a signal from the central control panel 74 goes through the fill float 44 if the final holding tank 42 is full the signal does not continue when the level begins to go down the signal continues and the process pump turns on if the level of water in the process tank 22 is high that signal will carry on to the process pump contactor 76 and the process pump 46 turns on if the water level in the process tank 22 is low that signal does not continue and the process pump is deactivated if water is detected by the float switch 16 in the trough 12 a signal is sent to the sump pump motor contactor 78 the sump pump 19 is activated and water is pumped to the process tank 22 when the discharge level in the trough 12 gets low the sump pump 19 turns off to insure that the sump pump 19 does not run dry if the process tank 22 runs to a high level the fill float causes the signal to not continue causing the sump pump 19 to turn off excess wastewater then overflows to the drain a plc program logic controller control panel 72 automates the backwashing process providing power to all components as well as handling all signals from float switches it may include a touch screen for easy operation feature as well as a computer system that makes it very easy to change.