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KE2KB 08-28-2011 09:42 AM

Sewer cleanout - which side of trap?
In our 85 year old house, we used to have two cleanouts, one for inside, one outside of the trap.
Then, within the last 10yrs, we had to have work done because the one cleanout pipe had a crack, and we were getting some gas in the basement.
Now there is only one cleanout.

Is this supposed to be the house or street side of the trap?
I have a suspicion that it is the street side, because when I open it, I get gas that I recognize as coming from the street. I guess if you're a plumber, you know what I am talking about... there is a definite difference in the smell between the house plumbing and the street.

If the cleanout is on the street side, then there is no cleanout for the inside, and the trap itself? How would someone clear the trap if needed?

The reason I am asking now is that we have a lot of water in the basement from Hurricane Irene, and I opened the cleanout to drain the water, and started smelling the gas, so I replaced the cap, then re-opened it and left it only partially open, with the cap sitting cocked in the pipe so the water can flow in, but most of the gas stays inside.

Thanks for your help.


oh'mike 08-28-2011 10:10 AM

What trap?

KE2KB 08-28-2011 08:29 PM


Originally Posted by oh'mike (Post 716534)
What trap?

That occurred to me after I posted. Is there a trap between the main sewer line in the house and the line that runs out to the street?
I always thought there was one.
I recall as a child, we had two sewer openings, right next to each other. They were covered with caps that didn't even screw down. Just fit into the openings, which were flush with the floor.
I was always of the impression that there was a trap between the two, so one was the "inside" and one the "outside" of the trap.


oh'mike 08-29-2011 05:43 AM

There shouldn't be a trap in the line---it would simply fill with --crud.

KE2KB 08-29-2011 08:56 AM


Originally Posted by oh'mike (Post 717108)
There shouldn't be a trap in the line---it would simply fill with --crud.

Guess it was one of those false assumptions based on what I had been told as a child, and never had a chance (or reason) to prove wrong :jester:

Thanks for the info


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