The Aqus point-of-use greywater system collects water from bathroom sinks and reuses it for toilet flushing. The drainage water is routed through a sanitizing and filtration system, and then collects in a storage reservoir under the sink; upon flushing, the water is pumped to the flush tank. According to the company, the system can reduce metered water usage in a two-person household by about 10 to 20 gallons a dayor approximately 5,000 gallons a year. 800.982.5839. www.sloanvalve.com.