The greywater system, added in 1993, is used to treat the water from bathroom sinks and showers, and includes a series of treatment barrels, as well as a gravel bed of plants. Tank 1 is the primary settling tank for the solids. It contains a mesh catchment device for hair, and a screen at the bottom used to collect particulate matter. Both are cleaned on a weekly or monthly basis. Tank 2 is the continued settling tank, where additional solid matter settles out of solution.
Water is pumped from here to sunspace.
Tank 3 is the holding tank in the sunspace, which is hooked to a small pump. The pump is on a timer and discharges water into the gravel beds twice a day, roughly every twelve hours. The constructed wetland consists of three different sized gravel substrates with water forced into them. Various wetland plants including water mint, arrowhead, and false papyrus were introduced to help cleanse the greywater. The 4th tank contains the treated greywater.