However, (and this is a very big "however") it is a highly volatile chemical that requires serious safety precautions. Before you pour it down your pipes, you need to know exactly how to use it and when not to use it.
. For extremely stubborn clogs, you may leave it for several hours, but do not use the sink during this time. Flush with Water: Slowly flush the drain with hot (not boiling) water to wash away the dissolved debris and remaining chemicals. Note: Some experts recommend cold water for the final flush if you are concerned about pipe sensitivity. Cre Chem (Qingdao) Limited +11 Risks and Limitations Pipe Damage: Caustic soda generates intense heat that can warp or melt uPVC pipes if left too long or used excessively. It can also corrode older steel or copper pipes. Crystallization: If the soda does not fully dissolve or clear the blockage, it can harden into a cement-like substance, making the blockage much worse and requiring pipe replacement. Type of Clog: While excellent for grease and hair, it is less effective against solid objects (like toys) or tree roots. Wolseley +5 Safer Alternatives If you are hesitant about using harsh chemicals, consider these gentler methods: Soda Crystals: Sodium carbonate decahydrate is less aggressive but still effective on light grease. Mechanical Tools: Use a plunger or a can caustic soda unblock drains
Never pour dry crystals directly into the drain. Dissolve roughly 750ml of caustic soda into 3 liters of cold water in a plastic bucket. Stir with a wooden spoon you intend to throw away. However, (and this is a very big "however")
Caustic soda works by breaking down organic materials that clog drains, such as: For extremely stubborn clogs, you may leave it