Sodium hydroxide 98% caustic soda

2275 grams

plunger barrel

a bucket with 1 gallon of warm water + - 30 º c, slowly dissolve 200 grams
wait away a thermal reaction. then pour the solution in the pipe to unclog, + -15 wait a few minutes and pour about 1 liter of boiling water

mix with hot water
wear rubber gloves

danger of burns to skin and eyes