Ways to clear the sewer blockage:

1. Animal fat blockage: If it is oily, it is recommended to use boiled water. Of course, it is better if you can buy concentrated sulfuric acid. If there is something blocking it, you can only use that special tool to clean the pipeline.

2. Cement plugging: 71% hydrochloric acid is not available, and 35% hydrochloric acid is sold everywhere. You can try it. Add a little flour to it to act as a corrosion inhibitor, and urotropine is the best. Can reduce the corrosion of steel.

3. Buy a 2-meter-long spring steel wire pipe dredging tool in the market, bend it at 1-2 cm above its head for 11-21 degrees, dredge it back and forth at the entrance and exit of the sewer, and flush it with water.

4. Go to the mall to buy professional powder for cleaning pipes.

5. Put in a small yellow locust, or add some irritating things such as washing powder or salt, and then cover the lid, and the sewer pipe will open in an instant.

6. Pour 1 cup of washing powder into the blocked sewer, and then pour 3 cups of hot water. If this doesn't clear the sewer, pour 1 cups of vinegar into it.

7. Insert a log with a diameter close to the inner diameter of the sewer pipe, put a certain amount of water in the pool, and quickly pump the log up and down without interruption. Under the action of suction and pressure, the blocked dirt in the pipe will be washed away.