Water conditioning system

Claim 1

A WATER CONDITIONING SYSTEM COMPRISING A PAIR OF TANKS CONTAINING GRANULAR MATERIAL AND EACH HAVING A PORT AT ITS UPPER AND LOWER ENDS, UPPER AND LOWER HYDRAULICALLY ACTUATED REVERSING VALVES CONNECTED AT SAID LOWER AND UPPER PORTS, OUTLET MEANS CONNECTED TO SAID LOWER VLAVE, WATER INLET MEANS CONNECTED TO SAID UPPER VALVE FOR FLOW TO AND DOWNWARDLY THROUGH A SELECTED TANK ONLY AND TO SAID OUTLET, AS DETERMINED BY THE SETTING OF SAID REVERSING VALVES, A METER FOR MEASURING FLOW THROUGH SAID INLET MEANS, A DRAIN MEANS CONNECTED AT SAID UPER VALVE, AN ALTERNATOR VALVE DRIVEN BY SAID METER AND CONNECTED TO SAID UPPER AND LOWER REVERSING VALVES HAVING MEANS TO SUBSTANTIALLY SIMULTANEOUSLY REVERSE THE SETTINGS THEREOF AND ALTER THE FLOW PATH FROMSAID INLET MEANS TO SAID OUTLET MEANS IN RESPONSE TO A PREDETERMINED VOLUME OF FLOW IN SAID INLET, THEREBY ALTERNATING THE CONNECTION OF SAID TAKS IN SAID INLET-TO-OUTLET FLOW PATHS, AND A REGENERATOR CONTROL UNIT CONNECTD WITH A SOURCE OF REGENERATING LIQUID AND WITH SAID LOWER VALVE AND RESPONSIVE TO ACTUATION OF SAID ALTRNATOR VALVE FOR CONTROLLING DELIVERY TO SAID DRAIN REGENERATING LIQUID FOLLOWING UPFLOW THROUGH THE TANK NOT CONNECTED WITH SAID OUTLET.