If your sink is completely full of water that won't budge, adding caustic soda will just create a pool of toxic, caustic liquid that makes manual repairs dangerous.
Can caustic soda unblock drains? Absolutely. It is one of the most powerful DIY solutions for grease and hair clogs. can caustic soda unblock drains
However, John also acknowledged the risks associated with caustic soda. He made a mental note to always handle the substance with care, wearing protective gloves and goggles, and to use it in well-ventilated areas. He also decided to take preventative measures to avoid future clogs, such as regularly cleaning his drains with natural methods and being more mindful of what he put down the sink. If your sink is completely full of water