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Old 11-20-2013, 06:48 PM   #1
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Venting issue?


I do not entirely understand venting. In a house where the rear bathroom drains downstream to the laundry room, and then to the front bathroom there is some gurgling going on. The rear bathroom toilet has overflowed. I have had the drains snaked twice and am flushing “Root Kill” down the front bathroom toilet.

Is it possibly a vent issue? I do not know how to even check this since all the walls are covered. Thank you for any help.

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Old 11-20-2013, 07:03 PM   #2
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Venting issue?


Yep, it's possible. Either a blockage somewhere in your main sewer line or clogged/poor venting. I had a clogged vent stack which I had to unblock. I got lucky and entered through the roof vent stack, snaked then flushed it out with a garden hose. May be worth a shot. However, according to your post, you mention flushing root kill down the bathroom toilet. Sounds like you know what the problem is, maybe just need it scoped/snaked by a pro to confirm it.

Do you have a lot of trees close by your house, like pine or maple? The reason I ask is because sometimes pine needles, leaves and criters can clog up your vent stack. If not, most likely it's a blockage somewhere in your main sewer line. Others will be along shortly with more advice for you. Thanks.


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Old 11-20-2013, 11:45 PM   #3
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Venting issue?


The plumbers flushed the main stack back in September when they snaked the line. They snaked it again a few days ago, and recommended the root kill. The residents say the line is still gurgling. There are no needle trees near the property. How do I check for correct vents?
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Old 11-21-2013, 12:18 AM   #4
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Venting issue?


have they pulled back roots when did the problem start
a good plumber should be able to tell the difference between a clog, partial clog, venting issue, etc,. camera down the line no guessing go straight to the problem.
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Old 11-21-2013, 06:11 PM   #5
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Venting issue?


What kind of venting am I suposed to have in the laundry room? Do I have to knock out my walls by the main stack to see if it is there?
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Old 11-21-2013, 06:44 PM   #6
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Venting issue?


I wouldn't knock out walls. Only as a last resort. What's your location?

IMO, from reading your post and all responds, sounds like the real issue is a blockage in your main sewer line which would require scoping it out with a camera as suggested above. Go from there. Just a thought. Others will be along shortly with more advice for you. Thanks.

Last edited by jmon; 11-21-2013 at 07:43 PM.
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Old 11-21-2013, 07:22 PM   #7
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Venting issue?


Quote:
Originally Posted by Javiles View Post
have they pulled back roots when did the problem start
a good plumber should be able to tell the difference between a clog, partial clog, venting issue, etc,. camera down the line no guessing go straight to the problem.
Call the plumbers back and get more info from them- what did they do, what did they find. Did they just pop it open and leave or did they run a camera.
If no camera- get it camera'd.
I'd do these steps before tearing into walls to investigate vents.
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Old 11-21-2013, 09:05 PM   #8
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Venting issue?


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Call the plumbers back and get more info from them- what did they do, what did they find. Did they just pop it open and leave or did they run a camera.
.
I doubt they have a camera set up. As I watched they snaked the main line out to the street. I could hear it making noise under my lawn. They said they encountered one blockage and it is now clear.
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Old 11-22-2013, 07:46 PM   #9
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Venting issue?


Your main sewer line may have a bow that is filled with water. Thats why one needs to camera it.
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Old 11-22-2013, 09:26 PM   #10
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Your main sewer line may have a bow that is filled with water. Thats why one needs to camera it.
Bow ?? Belly ghost belly
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Old 11-22-2013, 09:47 PM   #11
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Venting issue?


We requested that the residents not use the washing machine for a while, and they said the gurgling has stopped. They said they normally use the washing machine every day.
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Old 11-22-2013, 09:59 PM   #12
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Venting issue?


there is always a chance that the last guy to snake it used a small cutter and just poked a hole in the obstruction without actually removing it. The nationwide guys sometimes do this to set up a sewer line replacement on a recurring problem. Get a guy with a camera to inspect it and make you a copy of the disc or tape.
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Old 11-22-2013, 11:08 PM   #13
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Venting issue?


That's 4 plumbers here that say to camera the line......

I had a similar call recently. 2 basement floor drains would boil over when the laundry was run. Yet you could flush the toilets and all was fine. Turns out it was as Ghost suggested. The main line out side was back graded towards the house for about 20ft. The volume of water from the CW was too much for it. This was suspected but could only be confirmed with a camera. It can tell you about your roots, cracks, separations, collapsed line, bellies, etc.
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Old 11-23-2013, 03:03 PM   #14
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Venting issue?


Quote:
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Bow ?? Belly ghost belly
I'm getting old sometimes the memory did not click correctly.
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Old 11-23-2013, 07:59 PM   #15
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Venting issue?


As I said initially I do not really understand venting, so I would like to know how a washing machine should be vented. What about using an AAV?

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