The Sloan AQUS is based upon the premise that using fresh water to flush a toilet is unnecessary and wasteful. Our system takes the water that goes down the bathroom sink, filters and disinfects it, and uses it to flush the toilet. It does not cross connect to the fresh water system nor does it inhibit the backflow prevention. It simply uses resed water as the primary source for flushing the toilet then supplements it with fresh water, as needed. The system can save up to 6,000 gallons of fresh water per year and requires only annual maintenance.