If the shower drain smell of sewage, it is likely that the P-trap has dried out, there is hair or soap scum in the trap, the plumbing vent has become clogged or there is a sewer line issue. These can be the reason that an awful smell can creep into your bathroom. To determine the cause is the first step to ridding yourself of the foul odor and keeping it from happening again.
Why Does My Shower Drain Smell Like Sewage?
There are five common reasons your shower drain may smell like sewage.
1. A Dry P-Trap
The U-shaped pipe under your shower drain keeps water in and prevents sewer gases from getting into your bathroom. Water may evaporate if you don’t use your shower that often and odors can escape.
Instructions for correcting the problem: Shower water for a short period of time to refill the P-trap. If the odors persist, the trap may be leaking or other plumbing problems may exist.
2. Hair, Soap Scum, and Organic Buildup
Other debris and oils that accumulate from the hair, body and soap can find their way into your showers drains. As the organic material decomposes, it may give off unpleasant, odor smells that are similar to sewage.
Solution: Take the hair and dirt out of the drain location and use an appropriate bathroom cleaner to clean surfaces that will be removed again after cleaning. If the odor remains you may need to call a professional for deep odor removal.
3. A Blocked Plumbing Vent
The plumbing vent helps balance the air pressure in the plumbing drainage system and safely vents sewer gases outdoors. When the venting is obstructed, it could cause drainage issues and result in foul odors in your bathroom.
Common signs are when a faucet gulps, a drain smells constantly, or several drains smell bad.
Solution: Call a professional plumber to check on plumbing vent for clogging or damage.
4. A Clogged or Damaged Sewer Line
Repaired sewer pipe damage may let sewer smells into your house. The issue could impact multiple drains and cause problems to become even more severe when wastewater begins backing up.
Typical symptoms: several slow drains, frequent plumbing clogs, gurgling toilets or sewerage backing-up in the shower.
Solution: Get a professional plumber to check the drainage system. Sometimes, it is necessary to have a drainage camera or a sewage inspection.
5. A Loose or Damaged Drain Connection
Sewer odors can escape from a damaged seal, improperly connected drain or a damaged plumbing part. This may occur even if your shower drains as it should.
Solution: A plumber can check the drain assembly and connections to find out if repair or replacement is necessary.
How to Get Rid of a Sewage Smell in Your Shower Drain
Follow these steps to address common causes of shower drain odors:
- Run the shower water. This can restore the water seal in a dry P-trap.
- Remove visible debris. Clear accessible hair and soap residue around the drain opening.
- Clean the drain cover. Use an appropriate bathroom cleaner according to its instructions.
- Check for drainage problems. Notice whether the water drains slowly, the pipe gurgles, or other fixtures produce unpleasant odors.
- Call a plumber if the smell persists. Ongoing sewage odors may indicate a plumbing problem that basic cleaning cannot resolve.
Never mix bleach, drain cleaners, or other cleaning chemicals. Follow product labels and avoid using chemicals that may damage your plumbing.
When Should You Call a Professional Plumber?
If the smell of sewage is still present after cleaning the shower drain or if there are multiple slow drains, gurgling noises, multiple clogs or wastewater backup, contact a professional plumber.
These symptoms may be due to blockage of the vent, a leak in the plumbing or sewer line. A plumber will be able to tell you what is wrong, and what is required of you to repair the problem or clean the problem.
When the odour of the sewer gas is strong or the individual suffers from dizziness, nausea, evacuate the area and seek prompt professional assistance. A foul and unmistakable smelly gas does not mean that it is not dangerous.
How to Prevent Sewage Smells in Your Shower Drain
You can reduce the risk of shower drain odors by following these maintenance tips:
- Run water periodically in showers that are rarely used to maintain the P-trap water seal.
- Remove hair and debris from the drain regularly.
- Clean the drain cover and accessible surfaces.
- Address slow drainage and recurring clogs early.
- Arrange a professional inspection if odors repeatedly return.
Regular maintenance helps keep your shower drain clean and makes it easier to identify potential plumbing problems before they become more serious.
Frequently Asked Questions
Is a sewage smell from my shower drain dangerous?
Sewer gases may be health and safety hazards particularly if odors are strong, or persistent. Look at the source of the smell, don’t cover it up. If the smell is strong or you think there is a build-up of dangerous gas, leave the premises and call the relevant professional service.
Why does my shower drain smell like sewage but drain fine?
A shower may be draining normally and release sewage smells. It could be due to a dry P-trap, organic buildup, a plumbing vent issue or a faulty drain connection.
Can I pour bleach down a smelly shower drain?
Bleach can not solve the problem in most cases and can cause hazardous interactions when combined with other cleaners. Follow product directions and use proper cleaning techniques. If the sewage odor is still present, a professional inspection might be necessary.
Why does my shower drain smell worse after I use the water?
Fluctuations in water levels might make debris come floating or help identify issues with the drain trap or plumbing vent. If it keeps coming back after showering, have plumbing system examined
Can a plumber fix a shower drain that smells like sewage?
Yes. The treatment will vary according to the cause. The plumber can clear the clog, fix an issue with the plumbing trap, check the plumbing vent or look into a sewer line issue.
Get Help With a Smelly Shower Drain
If cleaning a shower drain doesn’t resolve the foul odor, Crest Plumbing can assist you with not only finding the source of the smell, but also what to do next.
If you have a drain problem in your Bathroom, call us and we can discuss Bathroom and Shower Drain Cleaning and what we can do to help you!
