1, preparation materials: salt, baking soda and white vinegar.

2. First, sprinkle a spoonful of salt, a spoonful of baking soda and the same amount of white vinegar on the slow-flowing sewer.

3. After adding white vinegar, it can be clearly seen that the three substances have reacted.

You can pour a cup of hot water in a few minutes.

5. After that, the sewer will be much smoother.

Phoenix Net-Video: What if the sewer is blocked? Teach you a quick way to dredge sewers.