Stinkies on the attack again

Hey guys, I haven't been on here in a while which is pure testimony to the great advice I was lucky enough to recieve before. I have a new question that may sound stupid but, as an old professor of mine once said, "The only stupid question, is the one you do not ask". So, here goes; This is my good friends house here in Atlanta and they have been experiencing occasional mild bursts of raw sewage odor (methane?). They have also pointed out a toilet that "bubbles" or "burps" from time to time and the odor seems to come from the same area. Upon investigation, I found that there is no "P" trap below the suspect toilet. This toilet was replaced by some kid a couple of years ago and the issues may have started then. I'm going to go out on a limb here and guess that the twist of flow built into the back of toilets is some form of a "P" trap itself. Is there a need for a proper "P" trap below this toilet?

Thanks,
Doc

The toilet has the trap built into it.

Is your friend on city sewer or a septic tank?

If it is a tank it may be signs that it needs pumping, if city sewer see if there is a clean out out side and look in it to see if the line is backed up.

Frost closure on a roof vent is also a possibility.

My friend is on city sewer and I will check into the clean out asap. Thanks.

This particular issue has been going on through the summer, therefore I', thinking frost may not be an issue. I think I'll check the vents for any other obstructions though.

Just noticed your posting from Georgia forget frost closure!

Cass said:

If it is a tank it may be signs that it needs pumping, if city sewer see if there is a clean out out side and look in it to see if the line is backed up.

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Wouldn't the line have to back up all the way to the vent serving the toilet to cause the problem?