Sewer odor and drain flies related?

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Old 10-30-09, 10:40 AM
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Sewer odor and drain flies related?

When the a/c is running, heater is running, or whole house fan, there is a sewer odor coming from vents in our home. We've had plumber after plumber look for the problem; seals around toilets, etc. No luck. We also have drain flies which we can't keep under control without using a drain cleaner once or twice a week. Could they be related? The last plumber suggested using a scope and trying to check some vent through the attic which we haven't done yet. When I pour bleach down the kitchen drain, it helps with the odor. I can smell bleach coming though heating vents immediately above furnace.
 
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Old 10-30-09, 02:11 PM
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With drain flies and the bleach smell comming thru your heating vents theres no doubt you have a leak in your sewer line. You have to check the area where you smell the bleach for a damaged or open sewer line, you have to get this fixed, this is an extreme health issue!

BTW Do you have a floor drain near your heat system, if so the trap could be dry and thats where the odor is comming from.
 
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Old 11-02-09, 10:20 AM
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Unhappy

Thank you for your response.

We do have a floor trap next to the furnace where the a/c drains into. It has water in it.

How do you check for a damaged or open sewer line? Is that something only a plumber can do?
 
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Old 11-02-09, 02:20 PM
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Originally Posted by Debbe76 View Post
Thank you for your response.

We do have a floor trap next to the furnace where the a/c drains into. It has water in it.

How do you check for a damaged or open sewer line? Is that something only a plumber can do?
You can smell around, but that is a limited way of finding a leak because you will lose your sense of smell quickly and need to breathe fresh air to get it back.

You may need to get a plumber to do a smoke test on your system to find out where it's leaking, sorry.
 
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Old 11-03-09, 04:04 PM
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Sewer Odor is coming from roof vents

That awful septic smell is coming from your roof vents because thats the way they were designed. Everytime you turn on the AC, Furnace, or even turn on a bathroom vent fan the plumbing vnt pipes on your roof are pushing foul air into the atmosphere and then you are pulling it into the structure.

Your only solution is a septic vent pipe filter.
 
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Old 11-06-09, 10:23 AM
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We've had several "smoke tests" with no positive results. Is there a chance that this leak is in an area where you wouldn't notice the smoke? There must be a leak or we wouldn't have the drain flies. Is there another way of checking for a leak?
 
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Old 06-22-13, 02:48 PM
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Does anyone know if this person ever resolved the problem? Our house is on a slab and we have two HVAC units. Only have the problem with the downstairs vents. Smell especially comes out of the vent in the kitchen.
 
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