Overflow alarm of solar water heater

The utility model relates to a water-saving alarm which is arranged on the overflow port of a solar water heater, belonging to the technical field of electric appliances. The utility model comprises a valve body 1, an insulating valve cover 5, and an electrical bell, wherein, a valve spindle 2 and a spring 3 are arranged in the valve body, and an overflow pipe 9 is on the side wall; the insulating valve cover 5 is provided with a circuit board 6; the bottom is provided with a binding post 8; one end of the electrical bell lead wire is connected with the valve body. The other end of the electric bell lead wire is connected with the binding post through the direct current power supply.