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timedshutdo 891

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is necessary to restrict or ration water usage in order to avoid waste and ensure that the supply will last throughout a given trip. Self-closing valves for control of a single supply, hot or cold, are well known. However, it is believed that no such valve has been conceived prior hereto that is self-closing even though its operating knob or handle is held depressed or actuated, particularly where the valve is also capable of mixing hot and cold water.

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