How to repair the toilet spray valve if it is broken?

If the toilet spray valve is broken, it can be repaired by the following steps:

1. Close the water source valve: First, close the water source valve of the toilet to prevent water supply to the toilet. If you don't know where the water source valve is, you can check the house plan or ask the plumber.

2. Cleaning the toilet: Clean the inside of the toilet with clear water to wash away dirt and accumulated water.

3. Dismantle the spray valve: find the spray valve, usually on the pipe behind the toilet or at the bottom, remove the screw that clamps the spray valve, and then unscrew the connecting nut of the spray valve with a wrench.

4. Check the water spray valve: Check whether the washer and O-ring of the water spray valve are worn or damaged. If so, it needs to be replaced.

5. Replace the spray valve: connect the new spray valve to the water pipe of the toilet. Before nuts, washers and O-rings should be installed to ensure water resistance. Then tighten the connecting nut.

6. Test the new spray valve: By opening the water source valve, test whether the new spray valve works normally. If everything is all right, the toilet can be reused.

In short, the water spray valve of the toilet is broken and needs to be repaired or replaced in time to ensure the normal operation of the toilet. If you are not sure, you can consult a professional plumber or maintenance personnel.