Plumbing Guide
Slow Drain? Common Causes and First Checks
A slow sink, tub, or shower drain often develops gradually and may have several common causes.
PlumbingOverview
Hair, soap residue, food debris, grease, or a restriction farther in the drain line can reduce flow.
Start here
What You Can Check
These are basic observations or simple checks. If anything feels unsafe or uncertain, stop and seek appropriate professional help.
- Remove visible debris from the drain opening if it can be reached safely.
- Check whether more than one fixture is draining slowly.
- Avoid repeatedly using harsh chemicals when the cause is unknown.
Pay attention
Warning Signs
- Multiple drains back up together.
- Sewage odor or wastewater backup.
- Water appears in another fixture when draining.
Next step
When Professional Help May Make Sense
If several fixtures are affected, the drain repeatedly clogs, or wastewater backs up, professional plumbing help may be appropriate.
Need Plumbing help?
Call for Plumbing Help
If this issue needs professional attention, use the matching Plumbing connection below.
Call for Plumbing HelpConnection availability can vary by location, routing availability, campaign conditions, and provider participation.Be prepared
What to Have Ready Before You Call
- Which fixtures are slow.
- How long the issue has been happening.
- Whether there are gurgling sounds or odors.
- Any products already used in the drain.
This content provides general homeowner guidance and is not a diagnosis of a specific home problem. For urgent, dangerous, or uncertain situations, contact an appropriate qualified professional or emergency service.