Abstract: A water conservation system having a control element and flow regulation device, the combination of which is in series with a hot water source and water discharge outlet. The water conservation system may further, or alternatively, comprise a shunt pipe extending substantially from the hot water source to a water discharge outlet and parallel to the hot water supply pipe. When ambient or low temperature water is detected in the hot water supply pipe, the combination control element and flow regulation device may divert low temperature water to a holding tank which preferably stores the water at atmospheric pressure. The holding tank may provide make-up water to a toilet's primary water closet or be used in other areas where clean water is desired or required.

Abstract: Domestic water conservation piping system has thermostatically controlled diverter valve in series with water heater and shower head and/or a hot water shunt tube extending from the hot water heater to the fixture hot water supply in parallel with the thermostat piping. When low temperature water is detected in the "hot water" line, the thermostatically controlled diverter valve diverts the low temperature water to a secondary water closet which stores the water at atmospheric pressure. The secondary water closet provides make-up water to a toilet's primary water closet.