Method of unblocking the blockage of sewage main pipe

The specific methods for blocking and dredging the sewer main pipe are as follows:

1, dredge with dredging agent.

Pour 50- 100g waterway dredging agent into the blocked sewer main pipe. If there is no water in the sewer at this time, pour about half a cup of water and let it stand for about 20 minutes. After 20 minutes, pour a lot of clear water into the main sewer pipe for flushing.

2, hand spiral steel wire method

Some sewers have a cover at the lower outlet and can only be dredged from the floor drain. At this time, hand-cranked spiral steel wire, generally 6 mm in diameter is enough. Rotate the spiral steel wire slowly by hand and shake it down from the hole in the sewer until it feels blocked by foreign objects. At this time, you can gently rotate and shake it to bring out the foreign bodies in the sewer.

3. Corrosion method

If the main sewer pipe is blocked by cement and other things that are difficult to be lifted by hand-operated spiral steel wire and cannot be dredged by dredging agent, 35% hydrochloric acid and a little flour can be used to achieve slight corrosion. It should be noted that the concentration of hydrochloric acid used must not be too high, otherwise it is easy to corrode not only foreign bodies, but also sewer pipes.

4. Contact the property and ask professionals to handle it.

Precautions:

No matter what method you take, you must pay attention to personal safety during the operation.