Sewer Smell In Bathroom - Plumbing - DIY Home Improvement | DIYChatroom

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing


Thread Tools Display Modes
Old 11-06-2008, 01:19 PM   #1
Join Date: Nov 2008
Posts: 1
Rewards Points: 10

Sewer Smell in Bathroom

I have a bad sewer smell in my small bathroom. I got on the roof and dropped a garden hose down the vent it seemed unobstructed. I ran the water from the garden hose for quite a while and could hear it (from the crawl space) running out to the sewer and it did not backup. While I was in the crawl space I decided it would be a good idea to install a trap. See the following images:

I still have a sewer smell, even after installing a trap. I have since reset the toilet with new wax ring but still have the smell.
Any thoughts?

Ok, so now I notice the smell from my kitchen sink. It has a trap (as well as the toilet and sink in the bathroom). So, does that mean these are being emptied? Should I suspect a leak in the vent stack?


dc11 is offline   Reply With Quote
Old 11-06-2008, 08:09 PM   #2
Join Date: Oct 2008
Location: Wisconsin
Posts: 235
Rewards Points: 162

You may want to reconsider the "central" trap you have for your bathroom. Your toilet already has one trap built in the porcelain. I think adding an additional trap downstream from the toilet is asking for trouble.

Sorry I don't have any good suggestions for fixing the sewer gas smell.


Some advice you receive on the internet can be worth exactly what you paid for it - be careful.
stubborn1 is offline   Reply With Quote
Old 11-06-2008, 09:52 PM   #3
Long-Time DIYer
Mike Swearingen's Avatar
Join Date: Mar 2005
Location: On Albemarle Sound In Northeastern NC
Posts: 1,460
Rewards Points: 500

As you've already been advised...get rid of that new trap. That will cause more problems than solving any. You might want to consider a clean-out there while you're at it.
If you have a sewer gas smell in your kitchen or bath, you obviously have a partial clog somewhere in the venting causing a trap to be siphoned out to create another "vent" whenever water is draining through the system.
You may want to snake the vents from the roof with a heavy-duty plumber's snake and THEN flush it down with a garden hose sprayer.
Good Luck!
Mike Swearingen is offline   Reply With Quote
Old 11-07-2008, 04:20 PM   #4
Join Date: Sep 2008
Location: Mass.
Posts: 48
Rewards Points: 25

The photo shows branches to the laundry and the kitchen sink /tub, if done correctly these branches will have their own branch vents and flushing down the the stack vent will do little if the branch vent is plugged. You could try removing the sink trap and try to expose the junction were the horizontal drain meets the vertical . Then try to snake the vertical branch vent.
The photo also shows a short 1/4 bend at the base of the stack which is not proper in Mass. But seeing there isn't much room, it will have to do. I wonder if the flushing of the toilet and discharging the wash-machine at the same time is causing the trap seals in the other fixtures to siphon?
plumcass is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sewage type smell coming from bathroom shower drain majorchamp Plumbing 29 06-25-2012 10:08 AM
sewer smell in old mobile home HELP! sunsoarcats Plumbing 11 01-07-2012 09:14 AM
Sewer gas smell in basement from sump pump mirage212 Plumbing 15 10-23-2008 06:09 PM
Sewer gas smell in basement when doing laundry on main floor Bornintc Plumbing 1 01-17-2007 11:04 AM
Old House sewer smell. Need Help! crytal Plumbing 7 11-30-2006 04:30 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1