Why Your Drain Keeps Blocking Again
26 May 2026
A blocked drain is frustrating — but when the same blockage keeps coming back, the real problem is usually deeper inside the pipes.
Most recurring drain problems are caused by a gradual build-up of:
- Grease and cooking fat
- Soap residue
- Hair and organic waste
- Food particles
- Hardened debris inside pipe walls
At first, water may still flow slowly. But over time, the inside diameter of the pipe becomes smaller and smaller until a full blockage happens again.
Common Signs Before a Major Blockage
- Slow draining sinks
- Bad smells from the drain
- Gurgling sounds
- Water backing up
- Frequent minor clogs
Many people temporarily fix the issue with plungers or supermarket liquids, but these often only clear the centre of the blockage — not the hardened build-up around the pipe walls.
Why Caustic Soda Works
Caustic soda (sodium hydroxide) reacts with grease, fat, and organic material, helping break down stubborn build-up inside the pipes.
When used correctly, it can help:
- Dissolve grease accumulation
- Clear organic waste
- Improve water flow
- Reduce recurring blockages
Prevent Future Drain Problems
To help keep drains clear for longer:
- Avoid pouring cooking oil into sinks
- Flush drains regularly with hot water
- Clean kitchen traps frequently
- Treat slow drainage early before a full blockage forms
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👉MUSON Caustic Soda 500G
- 👉MUSON Caustic Soda 5KG
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