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1. 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, said bypass line including a bypass pipe that has respective one and other ends, and a bypass valve having a cold water inlet port that is connected to the cold water inlet pipe, a cold water exit port that is connected to the cold water fixture and a hot water 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 internal chamber having a peripheral chamber wall, a center-mounted bi-metal spring that is disposed in the internal chamber and having an outer free end, and a shuttle mounted to the outer free end of the bi-metal spring and constructed and arranged to mate with the hot water discharge port in a closed position of the bi-metal spring, said bi-metal spring assuming an open position so that the shuttle disengages from the hot water discharge port at a predetermined water temperature to enable the hot water to enter the hot water discharge port and to the internal chamber.
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