Bypass valve

A water delivery system that includes hot and cold water lines that connect to respective hot and cold water fixtures and a bypass line, said hot water line including a hot water inlet pipe for receiving hot water from a hot water source and a hot water exit pipe that connects to the hot water fixture, said cold water line including a cold water inlet pipe for receiving cold water from a cold water source and a cold water exit pipe that connects to the cold water fixture, said bypass line including a bypass pipe that is connected between the hot and cold water lines and has one and other ends, and a bypass valve having a hot water inlet port that is connected to the hot water inlet pipe, a hot water exit port that is connected to the hot water exit pipe and a discharge port that is connected to the one end of the bypass pipe, said bypass valve further comprised of a valve body that defines an annular hollow internal chamber having a peripheral chamber wall, said hot water inlet port extending substantially tangentially of the peripheral chamber wall, said hot water exit port also extending substantially tangentially of the peripheral chamber wall, in line with said hot water inlet port and spaced about the peripheral chamber wall from said hot water inlet port, said bypass valve still further comprised of a bi-metal spring that is in the form of a center-mounted multiple coiled bi-metal spring having an outer free end, a support member for mounting the center of the bi-metal spring within the internal chamber of the valve body, and a shuttle mounted to the outer free end of the bi-metal spring and constructed and arranged to mate with the discharge port in a closed position of the bi-metal spring, said bi-metal spring assuming an open position to disengage from the discharge port at a predetermined water temperature to enable the hot water to discharge through the discharge port to the cold water line.