将氢氧化钠倒入水管。 尝试使用漂白剂。 使用管道清洁剂。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Caustic soda, or sodium hydroxide, is an extremely strong chemical that will dissolve most blockages clogging up your sink.  Caustic soda can be purchased at most hardware stores. Dilute 3 cups (750 ml) of caustic soda with 3/4 gallon (3 L) of cold water in a large mop bucket. Mix the chemical and the water together with a wooden spoon. Do not use any container or utensil you plan to use for food later on. Do not stir the water and caustic soda together with your hands. The water and caustic sod