Patent ID: 6328882
Filing Date: 2001-12-11
Classification: E03B,E03D,Y02A,Y10S,Y10T

Abstract:
A non-potable flush water system for recycling domestic waste water to supply flush water for sanitary fixtures within at least one residential unit, said system comprising:a drain, waste, and vent subsystem connectable to only baths, showers, and lavatories of all bathrooms in the at least one residential unit and drained to an oval-shaped receiving tank supplied with waste water drained from only bathing and lavatory plumbing fixtures installed in the bathrooms of the at least one residential unit, said tank having a narrow end and a wide end with the tank being equipped with a pump and an inlet pipe for transferring waste water to the tank and an outlet conduit for delivering the waste water at a required pressure as a sub-potable toilet flushing water supply to the sanitary fixtures in the at least one residential unit via visually recognizable different size and color conduits from that of a potable water supply distribution system in the at least one residential unit in response to a pressure sensing switch causing said pump to start and run until the pressure in the outlet conduit is restored to an intended maximum operating pressure to be maintained in a sub-potable flush water distribution piping and limited by a float switch in the receiving tank which shuts the pump off when liquid level in the tank falls below a predetermined level at which enough water remains in the tank above a pump inlet pipe to supply the water volume required to flush a connected sanitary fixture, said receiving tank being furnished with an overflow outlet at the narrow end of the tank permitting waste water received in excess of a predetermined storage capacity of the tank to be drained to a sanitary drainage system of the building, and said tank being fitted with an outlet sump at the narrow end of the tank near a bottom of the tank controlled by a valve to permit removal of sediments accumulated in the bottom of the tank to also be drained to the sanitary drainage system of the at least one residential unit, and an automatic low-water make up system comprised of a fresh water supply from a building potable water supply system connected by a conduit to a solenoid operated valve located at the wide end of the tank which discharges potable water via a supply conduit to an interior of the receiving tank across an air gap established between a maximum high water level to which liquid in the receiving tank can rise and an outlet of said conduit from the solenoid valve, said solenoid valve being operated by the float switch near the pump inlet pipe, connected to operate the solenoid valve.