Caustic soda is fast and effective for organic clogs in metal drains, but safety first . Wear PPE, work in a ventilated area, and store the container out of children’s reach.
⚠️ Caustic soda is dangerous. It burns skin and eyes and releases toxic fumes. Do not use it if you have a plastic or aluminum drain pipe (most modern pipes are plastic – check first!). Never mix it with other cleaners (especially bleach or acid). caustic soda unblock drain