Most slow or clogged sink, tub, and shower drains come from hair, grease, soap scum, and food packed into the trap or the branch line — and you can clear the majority yourself. Work from gentlest to strongest: pull out visible gunk, plunge it, then use a hand snake (drain auger). Skip the harsh chemical drain openers; they rarely fix a real clog and can damage older Houston pipes. If several drains back up at once, that is a main-line problem, not a single clog, and it needs a plumber.
What you'll need
- A cup plunger
- A hand drain snake / auger
- A bucket and towels
- Rubber gloves
- A flashlight
- A bent wire or hair-clog tool
Recommended parts & supplies
- Drain snake / hand auger — reaches clogs past the trap that a plunger cannot
- Sink / drain plunger — a flat cup style seals over a sink or tub drain
- Hair drain clog tool — a cheap barbed strip that pulls out hair clogs
- Zip-it drain cleaning tool — a pack of flexible strips for shower and sink drains
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Step by step
- 1
Clear the drain opening and stopper
Start at the top. Remove the pop-up stopper or drain cover — most lift or twist out — and pull away the hair and gunk wrapped around it. On bathroom sinks and tubs, this alone fixes a huge share of slow drains, because the clog sits right under the stopper.
- 2
Flush with hot water
For a grease or soap clog, boil a kettle or run the hottest tap water and pour it down in stages. Hot water softens grease and soap scum. Do not pour boiling water into a porcelain fixture or over PVC joints — hot tap water is safer for those.
- 3
Plunge the drain
Fill the sink or tub with an inch or two of water so the plunger cup seals. If it is a double sink, block the other drain with a wet rag. Coat the rim with a little petroleum jelly for a tight seal, then plunge firmly 10–15 times. The suction and pressure break most clogs loose. Repeat a couple of times before giving up.
- 4
Check and clean the P-trap
Under the sink is the U-shaped pipe (the P-trap). Put a bucket under it, unscrew the two slip nuts by hand or with pliers, and pull the trap off. Food and hair collect right here — clean it out over the bucket, then reassemble. This is the single most effective DIY fix for a stubborn sink clog.
- 5
Run a hand snake past the trap
If the trap was clear, the clog is deeper. Feed a hand drain snake into the drain (or into the pipe stub in the wall with the trap removed), crank it until you feel the blockage, push through and twist to grab it, then pull it back out. Have a bucket and towels ready — what comes out is messy.
- 6
Flush and test
Run hot water for a minute or two to wash the loosened debris fully down the line and confirm the drain flows fast again. If it drains well, you are done. To keep it clear, use a drain strainer and flush monthly with hot water.
When to call a pro
Call a plumber if the clog will not clear after plunging and snaking, if the drain keeps clogging every few weeks, or — most importantly — if several fixtures back up at the same time or a toilet gurgles when the washer drains. Those signs point to a clogged main sewer line, which needs a professional machine auger or hydro jetting. Houston homes with mature trees and old cast-iron lines are prone to root intrusion that a hand snake cannot fix, and a sewer camera inspection is worth it to find the real cause.
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How to Unclog a Drain Before You Call a Plumber — FAQ
Should I use chemical drain cleaner to unclog a drain?
Why do all my drains clog at the same time?
How do I clear a hair clog in the shower?
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