There is a specific satisfaction in pouring a cup of crystals into a stagnant drain, hearing a hiss, and watching the water vanish. Caustic soda, chemically known as , is the heavy artillery of domestic drain cleaning. It is not a gentle maintenance tool; it is a weapon of mass destruction for organic blockages.
Do not pour leftover caustic soda mixture down a working drain just for disposal. Instead: how to unblock drain with caustic soda