The grey water tank has a simple mesh filter and the toilet cistern also, to catch lint from laundered clothes. Reed Bed 1 or 2 beds 1 metre deep lined with strong black plastic and filled with gravel, with a thin layer of soil or sand on top. Plants are grown on top. Blackwater from kitchen enters reed bed from grease trap by an inlet pipe at one end and leaves reed bed at the other by a low lying outlet pipe. Water can be collected from the other end for garden watering etc.
Onsite tests show water is potable enough to use in hot water system.
A gravity fed system is best Site specific with rainfall, seasonal growth patterns and annual quantity of water to be treated, being key variants influencing size and effectiveness. Everything that goes into the system must be non toxic and biodegradable. Case Study Results Annual mains water savings with tank supplying all household needs. Melbourne household is some 234,000 litres.