one hundred gallon per minute the outlet of the circulation pump 46 is connected to he filtration bank inlet conduit 48 a pressure gauge 49 is provided on this conduit so that the system operator may immediately tell what the back pressure of the filtration bank 16a 16b is also provided on the inlet conduit 48 is a rinse water diverter valve 50 upstream of the vale 50 is a rinse water conduit 52 which also includes a rinse water diverter valve 53 during a rinse cycle diverter valve 50 is open and valve 53 is closed so that the circulation pump 46 circulates rinse water within the machine 3 through the filtration banks 16a 16b however at the end of each rinse cycle diverter valve 50 is shut and valve 53 is opened so that the pump 47 will empty the rinse water out through the outlet conduit 11 of the machine 3 and into a rinse collection tank 54 as will be discussed in detail hereinafter the rinse water emptied into the collection tank 54 will ultimately be polished by a rinse water polisher and recycled back into the rinse water reservoir 8 upstream of the circulation pump 46 is the previously mentioned collection sump 56 the purpose of the sump 56 is to allow the wash or rinse water contained within the machine 3 to be rapidly dumped out of the machine through the wide outlet conduit 11 so that the water flows out of the interior of the machine 3 in a.