Abstract: A water saving toilet includes a sink mounted to a fixture base above a toilet tank. A drain opening in the bottom of the sink leads directly into the toilet tank, and a domestic water supply shutoff valve in the tank diverts water from the tank and directs it through a water diverting line leading to a spout adjacent the sink. After the toilet is flushed, domestic water preferentially passes from the supply valve through the water diverting line to the spout on the sink so the water will run continuously through the spout and into the sink for use in washing. Recycled water runs from a drain in the sink into the toilet tank to fill the tank for the next flush cycle. The float ball in the tank shuts off the supply valve after the tank fills which also shuts off the supply of water to the spout, so the volume of water diverted through the sink for washing is regulated to the amount for one flush cycle.