Patent ID: 7753622

Claim:
A method for maintaining water balance in a property equipped with a drainage system for handling waste water, said method comprising: providing a closed drainage system on said property for both fresh water supply and removal of waste water from a house on said property, said closed drainage system comprising a fresh water container connected to one or more appliances in said house, which are in turn connected to a waste water container in said drainage system, and supplying a quantity of fresh water from a source outside the drainage system to said fresh water container, wherein said quantity of supplied fresh water is essentially the same as a quantity of waste water removed or to be removed from said waste water container and taken off the property, wherein said closed drainage system is configured to: (i) hold said waste water in said waste water container so that the waste water is separate from the fresh water, (ii) remove said waste water from said property, and (iii) prevent contaminating said property and/or a ground water supply thereon with said waste water, wherein a portion of said fresh water is conveyed from said fresh water container to the house and is utilized to convey waste material from the house to said waste water container to thereby become part of said waste water in said waste water container, wherein the fresh water container and the waste water container are arranged to be fixed to said property, wherein the fresh water supplied to said closed drainage system is not taken from a ground water supply on said property, wherein each of the fresh water container and the waste water container is at least partially buried below ground on the property, and wherein the fresh water container and the waste water container are each positioned in a respective chamber inside one and the same combination container.