Patent ID: 6309539
Filing Date: 2001-10-30
Classification: C02F,F04D

Abstract:
A filtration and subsurface distribution system comprising:a recirculating pump tank for receiving the effluent from a septic tank, said recirculating pump tank having a top and a bottom;a sand filter pump located within the recirculating pump tank, the sand filter pump dosing a sand filter with the effluent;a dosing vault for receiving filtrate from the sand filter, the dosing vault being located in the recirculating pump tank remote from the sand filter pump and having a lower end adjacent the bottom of said recirculating pump tank and an open end spaced from the top of said recirculating pump tank, said dosing vault isolating the filtrate from the effluent in the recirculating pump tank;a dosing pump for dosing an absorption drain field with the filtrate in the dosing vault, the dosing pump being located within the dosing vault and also isolated from the effluent; anda control unit adapted to control the sand pump and the dosing pump in tandem to prevent effluent in said recirculating pump tank from mixing with filtrate in said dosing vault by preventing the level of either effluent or filtrate from rising above said dosing vault upper end.