Water purification system

Claim 1

A WATER PURIFICATION SYSTEM, COMPRISING A SECPTIC TANK HAVING AN INLET OPENING AND AN OUTLET OPENING, MEANS CONNECTING SAID INLET OPENING TO A SOURCE OF WATER WHICH IS TO BE PURIFIED, A HOLDING ANK HAVING AN INLET OPENING, A PIPE CONNECTING THE OUTLET OPENING OF THE SEPTIC TANK TO THE INLET OPENING OF THE HOLDING TANK, A FILTER TANK LOCATED ABOVE THE HOLDING TANK, FILTER MATERIAL IN THE FILTER TANK, A FILTER OUTLET PIPE CONNECTED TO THE FILTER TANK NEAR THE TOP THEREOF, A FILTER INLET PIPE CONNECTED TO THE BOTTOM OF THE FILTER TANK, AN ELECTRIC PUMP HAVING ITS OUTPUT CONNECTED TO THE FILTER INLET PIPE, A PIPE CONNECTED TO THE HOLDING TANK NEAR THE BOTTOM THEREOF AND CONNECTED TO THE INLET OF THE PUMP AND MEANS INCLUDING A FLOAT OPERATED SWITCH CONNECTED TO THE HOLDING TANK AND TO THE PUMP FOR ACTUATING SAID PUMP AT A FIRST PREDETERMINED LIQUID LEVEL IN SAID HOLDING TANK TO PUMP LIQUID FROM THE HOLDING TANK TO THE FILTER TANK AND FOR DEACTUATING SAID PUMP AT A SECOND PREDETERMINED LIQUID LEVEL IN SAID HOLDING TANK TO ALLOW LIQUID IN SAID FILTER TANK TO FLOW BY GRAVITY FROM SAID FILTER TANK THROUGH SAID PUMP AND INTO SAID HOLDING TANK, A DRAINAGE PIT LOCATED BELOW SAID HOLDING TANK, A PIPE CONNECTING THE BOTTOM OF SAID HOLDING TANK TO SAID DRAINAGE PIT, AND A VALVE IN THE LAST MENTIONED PIPE.