Is there a problem with the toilet fill valve that can cause the water in the tank to flow backwards

There will be no phenomenon that the landlord said, the water in the water pipe is pressurized, and the water discharge in the water tank can only be discharged into the toilet

The water outlet valve is installed in the water tank with a screw ruler wire, and the split is to be disassembled at the bottom of the water tank and tightened with a large plastic Ling Xingming nut. Zhidong sanitary ware.

The outlet valve is not well seamed and leaks.

The construction principle of the water valve in the toilet tank: there is a float in each automatic flushing toilet, as the water level in the toilet rises, the buoyancy generated by the float is getting bigger and bigger, when the water level rises to a predetermined value, the buoyancy generated by the float will be transmitted to the switch through a seesaw structure, the switch is closed and then the water inlet valve will not enter the water, when the water is discharged, the button or wrench pulls the plug of the water discharge, and the plug is automatically pulled out. After the water is discharged, the plug automatically returns to its position under the action of the spring and enters the next round of water filling cycle.

The working principle of the toilet inlet valve is to use the buoyancy of the water, the principle of lever, when the water is discharged, the float weight opens the valve, the water is in, when the water is discharged, the water seal falls completely, and the float is raised to close the valve upward after the water is inlet to control the water inlet of the water tank.