chief method

1, animal fat blockage: If it is oily, it is recommended to flush it with boiling water. Of course, it would be better if you could buy concentrated sulfuric acid. If it is oily, it can be removed with 20% Sufangda water. If something blocks it, you must use a special tool to clean the pipe. ?

2, cement plugging: buy 35% hydrochloric acid, add a small amount of flour, play the role of corrosion inhibitor, urotropine is the best. The corrosion of steel can be reduced. ?

3. Buy a 2-meter-long spring steel pipe dredging tool in the market, bend it at 10-20 degrees above its head 1-2 cm, dredge it back and forth at the sewer entrance and exit, and rinse it with water.

Sewer is a kind of urban public facilities, which appeared as early as ancient Rome. They picked up some junk in the garbage and built a simple "house" to live in. The beds, wardrobes and bookcases were all picked up. Later, Adalia left the Romans the most magnificent sewer in the ancient world: the Great Cloak.

Around the 6th century BC, Idahoans dug a sewer into the Tiber River, and its main road was over 65,438+06 feet wide, which was later expanded by the Romans. Seven branches of the sewer pass through the city streets and finally flow into the main road Maxim sewer.