Major water leak prevention apparatus for water inlet valve

A major water leak prevention apparatus for a water inlet valve, the major water leak prevention apparatus is mounted to a water inlet valve body and comprises a swing arm, a regulation bar, a float, a water container, a siphon tube, a water receptacle tray, and a counterweight float;

• the swing arm is rotatably mounted to the water inlet valve body, the swing arm having an end to which a back pressure pad is mounted to correspond to a back pressure hole of the water inlet valve body, the swing arm having an opposite end connected to the regulation bar, the float being mounted on the regulation bar and received in the water container, the water container being mounted on the water inlet valve body, the siphon tube being mounted on the water container;
• the water receptacle tray is mounted on the water inlet valve body and is located above the water container, the water receptacle tray comprising an overflow port formed thereon, the overflow port being located above the water container, the water receptacle tray having a bottom in which an opening is formed;
• and the counterweight float is mounted on a lower end of the water inlet valve body, the counterweight float comprising a water compartment and a buoyance compartment, the water compartment and the buoyance compartment being distinct compartments but integrated together, the water compartment and the buoyance compartment being arranged at the lower end of the water inlet valve body, the bottom opening of the water receptacle tray being connected, via a passageway pipe, to the counterweight float, wherein in a condition where the weight of the water compartment is greater than the buoyance of the water compartment, the water compartment blocks a lower end opening of the passageway pipe;
• and in a condition where the weight of the water compartment is smaller than the buoyance of the water compartment, the water compartment opens the lower end opening of the passageway pipe.