Thermostatic toilet flush valve

A system for providing cool water from a hot water supply to a toilet which comprises:

• (a) a first fluid conduit having a passage with an inlet and outlet for directing cold flush water into the toilet and with an intermediate opening in the conduit into the passage;
• first check valve means mounted adjacent to the inlet of the first fluid conduit to the passage for controlling the flow of the cold flush water into the passage;
• a second fluid conduit mounted on and closing the opening in the first fluid conduit;
• a thermostat means mounted in the second fluid conduit for controlling the flow of water from a hot water supply into the passage which is controlled by the temperature of the water from the hot water supply to the thermostat means such that the thermostat means is open when the water is cool and closed when the water is hot;
• a second check valve means mounted on the second fluid conduit preventing the flow of cold flush water through the intermediate opening and out of the second fluid conduit and allowing flow of the water from the hot water supply into the second fluid conduit wherein the control unit allows cool water from the hot water supply to flow through the second fluid conduit until the water becomes heated and then the thermostat means closes the second fluid conduit when hot water moves through the second fluid conduit to the first fluid conduit and thereafter only cold flush water is supplied to the toilet through the passage between the inlet and outlet of the first fluid conduit and wherein the first check valve means is closed when the thermostat means is open and water from the hot water supply is flowing through the second check valve means and past the thermostat means;
• (b) a pipe supplying cold water to the inlet and through the passage of the first fluid conduit to the toilet and a pipe supplying cool water from the hot water supply to the second fluid conduit;
• and
• (c) a flush toilet having a flush water supply line with the first fluid conduit of the system mounted in the supply line, wherein cool water from the hot water supply flows through the second fluid conduit to the first fluid conduit until the thermostat means closes the first fluid conduit.

A method for providing alternate supplies of water to a flush toilet as a result of flushing of the toilet, which comprises:

• (a) mounting a control unit for the alternate supplies of water, adjacent to the toilet wherein the control unit comprises:
• a first fluid conduit having a passage with an inlet and outlet for directing cold flush water into the toilet and with an intermediate opening in the conduit into the passage;
• first check valve means mounted adjacent to the inlet of the first fluid conduit to the passage for controlling the flow of the cold flush water into the passage;
• a second fluid conduit mounted on and closing the opening in the first fluid conduit;
• a thermostat means mounted in the second fluid conduit for controlling the flow of water from a hot water supply into the passage which is controlled by the temperature of the water from the hot water supply to the thermostat means such that the thermostat means is open when the water from the hot water supply is cool and closed when the water is hot;
• second check valve means mounted in the second fluid conduit for preventing the flow of the cold flush water through the intermediate opening and out of the second fluid conduit and for allowing the flow of the water from the hot water supply into the second fluid conduit, wherein the control unit is mounted adjacent the flush toilet by connecting the inlet of the first fluid conduit to a first pipe for supplying cold water to the toilet and the outlet of the first fluid conduit to a flush water supply line which is connected to the flush toilet and by connecting the second fluid conduit to a second pipe which is connected to the hot water supply;
• and wherein the control unit allows cool water from the hot water supply to flow through the second fluid conduit until the water becomes heated and then the thermostat means closes the second fluid conduit when hot water moves through the second fluid conduit to the first fluid conduit and thereafter only cold flush water is supplied to the toilet through the passage between the inlet and outlet of the first fluid conduit and wherein the first check valve means is closed when the thermostat means is open and water from the hot water supply is flowing through the second check valve means and past the thermostat means;
• and
• (b) flushing the toilet, wherein the control unit controls the supply of the water to the toilet such that cool water from the hot water supply flows through the second fluid conduit to the first fluid conduit until hot water closes the thermostat means in the second fluid conduit and thereafter cold water in the first fluid conduit flows to the toilet.