DOMESTIC HOT WATER SERVICE INLET SHUT OFF VALVE TRIGGERED BY FLUID LEVEL IN OVERFLOW TRAY

摘要

A mechanism for opening or closing a shut-off valve, the mechanism having a valve actuator for moving the valve from a first position to a second position, an urging means, a trigger which, when activated, triggers operation of the valve actuator, the trigger including a retainer which ordinarily holds the shut-off valve in the first position against the force applied by urging means, and a sensor reactive to an external stimulus which releases the trigger upon receiving appropriate external stimulus.