How to unclog a drain
What actually works — and why to skip the chemical drain cleaners.
By The T.A.P. Team · February 2024 · 6 min read
Most slow or clogged drains clear with a plunger, a drain snake, or a hot-water-and-baking-soda flush — no harsh chemicals needed. In fact, chemical drain cleaners can corrode pipes and rarely fix the real blockage. If a clog keeps coming back, or several drains back up at once, the problem is deeper in the line and it's time for a pro. Here's the safe order to try.
- 1Plunge the drain (cover overflow openings first).
- 2Pour boiling water — or baking soda + vinegar, then hot water.
- 3Remove and clean the sink stopper or pop-up.
- 4Use a hand drain snake for a stubborn clog.
- 5Skip chemical drain cleaners — they can damage pipes.
Start with a plunger
A cup plunger clears most sink and tub clogs. Cover any overflow opening with a wet rag first (so you can build suction), add enough water to cover the plunger cup, and plunge firmly a dozen times. For a double sink, block the other drain. This simple step fixes a large share of clogs before anything else.
Hot water, baking soda, and vinegar
For grease and soap buildup, a kettle of boiling water often does the job. For a bit more, pour in about a half-cup of baking soda, then a half-cup of vinegar, let it fizz for 10–15 minutes, and flush with hot water. It's gentle on pipes and surprisingly effective on organic buildup.
Clean the stopper, then snake it
Bathroom sinks and tubs clog with hair on the stopper — pull the pop-up or stopper, clear the gunk, and you've often solved it. If it's still blocked, a hand-crank drain snake (auger) reaches the clog and breaks it up or pulls it out. Feed it slowly and don't force it around tight bends.
Why to skip chemical drain cleaners
Liquid drain cleaners generate heat and harsh chemistry that can soften PVC, corrode older metal pipes, and damage seals — and they often just bore a hole through a clog that reforms. They're also hazardous if you later have to open the pipe. A plunger and a snake are safer and more reliable. Prevent clogs with good habits: no grease down the drain, and use drain screens.
| Symptom | Likely cause | What to do |
|---|---|---|
| One slow sink | Local clog (hair/grease) | Plunge, then snake |
| Tub won't drain | Hair on the stopper | Clean the stopper |
| Kitchen sink backs up | Grease buildup | Hot water + baking soda |
| Clog keeps returning | Deeper line buildup | Call a pro |
| Multiple drains back up | Main line blockage | Call a pro now |
You can DIY
- Plunge the fixture
- Boiling water / baking soda + vinegar
- Clean the stopper or pop-up
- Use a hand drain snake
- Use drain screens to prevent clogs
Call a pro
- A clog that keeps coming back
- Several drains backing up at once
- A main sewer line blockage
- Anything needing a powered auger
- Sewage odors or gurgling toilets
The professional approach to a clog is mechanical — a plunger, then a snake — not caustic chemicals that can damage pipes and rarely fix the underlying blockage. If a mechanical attempt doesn't clear it, or the clog returns, that's the signal it's deeper in the line and worth a pro's camera and auger, not another bottle of drain cleaner.
When one clog is really a main-line problem
If a plunger and snake don't do it — or several fixtures back up together — the blockage is likely in the main line, sometimes from tree roots that thrive in North Texas. We clear stubborn and main-line clogs across Garland, Richardson, and Plano with cameras and powered augers. See our plumbing services.
The short version
- Start with a plunger — it clears most sink and tub clogs.
- Boiling water, or baking soda and vinegar, handles grease and soap buildup.
- Pull and clean the stopper — hair is the usual bathroom culprit.
- A hand drain snake reaches stubborn clogs a plunger can't.
- Skip chemical drain cleaners — they can damage pipes and rarely fix the cause.
- Multiple drains backing up at once means a main-line problem — call a pro.
Unclogging drains — frequently asked questions
Clog you can't clear?
Get a free diagnosis and fast drain cleaning. Serving Dallas–Fort Worth & North Texas for over 25 years.