Blocked Drain? Causes & How to Clear It
Updated January 2026 · 2 min read
Quick Answer
A blocked drain is usually caused by accumulated grease and food in the kitchen, or hair and soap scum in the bathroom. Try a plunger and hot water first; avoid harsh acids that damage pipes. If water still backs up or multiple drains are slow, book a plumber — it may be a deeper main-line blockage needing a drain machine.
Key Takeaways
- Kitchen blockages are mostly grease and food; bathroom blockages are hair and soap scum.
- A plunger and hot (not boiling) water clear most minor blockages.
- Avoid strong acid cleaners — they corrode pipes and joints over time.
- Multiple slow drains at once usually mean a main-line or stack blockage.
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A blocked drain rarely happens overnight — it builds up gradually until water drains slowly and then backs up entirely. In the kitchen the cause is almost always congealed grease combined with food particles that narrow the pipe over weeks; in the bathroom it is hair bound together with soap scum collecting in the trap. In low-lying parts of Mumbai and the Mira-Bhayandar belt, monsoon silt and debris in external chambers add another layer of blockage during the rains.
For a single slow drain, start with mechanical methods: clear any visible debris from the mouth, then use a plunger with the overflow covered to build proper suction. Follow with hot — not boiling — water to help dissolve grease. Avoid strong acid drain cleaners; they offer a brief fix but corrode pipe walls and joints, leading to leaks that cost far more than the original blockage. If several drains run slow at the same time, the problem is usually deeper in the main line or soil stack and cannot be cleared from a single fixture.
A ProFixer plumber clears the trap, uses a powered drain-cleaning machine or rodding for deeper blockages, and inspects the line so the blockage does not simply return. They will also fit strainers and advise on what not to put down the drain. Book plumbing service across Mira Road, Bhayandar, and Borivali for transparent pricing and a 30-day workmanship warranty on eligible jobs.
Frequently asked questions
Should I use acid to clear a blocked drain?
No. Strong acids corrode pipes and joints and can cause leaks. Use a plunger and hot water for minor blockages, and call a plumber with a drain machine for stubborn ones.
Why are all my drains slow at once?
When multiple drains back up together, the blockage is usually in the shared main line or soil stack, which needs a plumber to clear from the chamber rather than a single fixture.
Should I use acid to clear a blocked drain?
No. Strong acids corrode pipes and joints and can cause leaks. Use a plunger and hot water for minor blockages, and call a plumber with a drain machine for stubborn ones.
Why are all my drains slow at once?
When multiple drains back up together, the blockage is usually in the shared main line or soil stack, which needs a plumber to clear from the chamber rather than a single fixture.
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