Sewer gas leak - help please!

Users who are viewing this thread

Sam3696

New Member
Messages
4
Reaction score
0
Points
1
Location
Quebec, CA
Hello!

Since we moved into our townhouse 3 months ago, we have had a bad chemical smell underneath the kitchen island.

Our pre-purchase home inspector said the dishwasher hose didn't have a high enough loop so we had that corrected.

The former owners said they had a problem with the garburator in the kitchen island where the gasket broke (but they had it repaired). Once we moved in, we didn't use the garburator for a couple of months and then had it removed. The dishwasher also smelled strongly of chemical, so we replaced it with a new dishwasher.

Last month, a plumber said that one of the pipes (air trap) under the kitchen island wasn't sealed properly and had been releasing toxic sewer gas into our air. He sealed the pipe and we thought it was resolved. But the chemical smell has persisted.

Last week end we had a strong smell of rotten eggs around the kitchen when we came home. The fire department confirmed it wasn't natural gas. They said it may be sewer gas.

So on Monday we had another plumber come, and he confirmed it wasn't a problem with the air vent under the kitchen island. On Friday, plumbers came back to do a smoke test. The only place where smoke appeared was in the garage, but the plumber said that was because the balloon they had used to block the drain had deflated a bit, and then he reinflated it. Other than that, we didn't see smoke anywhere. And now no one knows what else to suggest.

We have two little kids living in the house so we are eager to get this resolved.

Any suggestions would be much appreciated!
Sam

E56CB6C0-BF26-4876-A541-EB5C3F190E45.jpeg
E8DD9D13-6622-4604-B1BD-9239446C3FC1.jpeg
062C42AD-9DB7-403B-8ADB-3D974BC9452B.jpeg
3AFCCCDD-A1ED-4860-8632-AD85055E5391.jpeg
 
Last edited:

Jeff H Young

In the Trades
Messages
4,759
Reaction score
1,038
Points
113
Location
92346
I wonder if the smoke test was effective.... in other words can you confirm that smoke made its way in to the kitchen area? Having the AAV cheater vent would likely not allow smoke to come in kitchen.
I recommend removing the AAV installing some sort of temporary hose to the place where AAV was route hose to out side of house.
If smoke comes out hose and no smoke in kitchen I will be stumped.
At this point that's my only idea
In other words I suspect the test wasn't properly done but can't be sure
 

Sam3696

New Member
Messages
4
Reaction score
0
Points
1
Location
Quebec, CA
i wonder if the smoke test was effective.... in other words can you confirm that smoke made its way in to the kitchen area? Having the AAV cheater vent would likely not allow smike to come in kitchen.
I recomend removing the aav installing some sort of temporary hose to the place where aav was rout hose to out side of house.
If smoke comes out hose and no smoke in kitchen I will be stumped.
At this point thats my only Idea
In other words I suspect the test wasent properly done but cant be sure
 

Sam3696

New Member
Messages
4
Reaction score
0
Points
1
Location
Quebec, CA
Thank you! They opened part of the pipe under the sink (see pic) during the air test and we saw smoke coming out so I think it did reach the kitchen.

6B444F5E-D30F-4C13-8B8D-BD434128C472.jpeg
 

Sam3696

New Member
Messages
4
Reaction score
0
Points
1
Location
Quebec, CA
This may be completely unrelated but I keep seeing these tiny black dots under the counter (even after I removed them a month ago), maybe it's shedding off the bottom of the sink though? (See pic). My husband thinks this is from when the plumber cut the pipe earlier in the week.
 

Attachments

  • 174F2085-B761-4B0E-8B06-9AD1E25FD1FD.jpeg
    174F2085-B761-4B0E-8B06-9AD1E25FD1FD.jpeg
    52.1 KB · Views: 63
  • 078D0044-3C8A-4D1A-9375-02FBD8B1D140.jpeg
    078D0044-3C8A-4D1A-9375-02FBD8B1D140.jpeg
    77.6 KB · Views: 64
  • EB01218C-3733-4990-BF21-38ACE59FFD10.jpeg
    EB01218C-3733-4990-BF21-38ACE59FFD10.jpeg
    59 KB · Views: 62
Last edited:

Jeff H Young

In the Trades
Messages
4,759
Reaction score
1,038
Points
113
Location
92346
well if it passed smoke test then you don't have a vent leak. but I still have doubts run that hose outside and you see smoke bellowing outside kind of close it off so some smoke continues and if there is still no smoke in the house .... we are barking up the wrong tree.
maybe you got a soaked floor on a slab with mold underneath I don't know
 

Sylvan

Still learning
Messages
2,377
Reaction score
556
Points
113
Location
New York
Sewer gas is a byproduct of the breakdown of natural human waste. ... The hydrogen sulfide in sewer gas is what gives it its signature rotten egg smell. Sewer gas isn't necessarily toxic at low levels. However, chronic exposure, or higher levels of exposure, can cause symptoms of sewer gas poisoning.

While sewer gas isn't dangerous in small amounts, these compounds contribute to sewer gas toxicity at high levels. ... At higher levels, ammonia is toxic to humans. It can cause organ damage or death. Methane and carbon dioxide are both relatively nontoxic greenhouse gases

I would suggest and oil of peppermint test as a leak in a wall many not be detected by a smoke test

Or invest in one of these

https://www.forensicsdetectors.com/...tfXNisJF5gv4inAisMAPcGmvCS_OVmfRoCSmYQAvD_BwE
 

Jeff H Young

In the Trades
Messages
4,759
Reaction score
1,038
Points
113
Location
92346
Great idea the meter at 100 bucks practically disposable. buy the tool, sell on eBay later ,
Somethings not mentioned ... Is house on concrete slab
If smell is from kitchen sink and its an island leak not likely to be in wall. but smell is often hard to pinpoint by nose.
If not on slab get underneath and do visual inspection
 
Last edited by a moderator:
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks