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Question DetailsAsked on 8/25/2017

Is This Correct Venting? I Live in St.Louis County Missouri

So I received a plumbing violation when I was trying to get an occupancy permit. I contracted a plumber to update the plumbing and he removed my cast iron stack and the abs glued to pvc and this is the final project for $2800 but is this correct? My concern is I smell sewer after I flush the toilet. I have a ranch home and 2 toilets are back to back, in one of the bathrooms there's a tub/shower and the other is just a shower. The 2 toilets run are in a straight line and run over to the vent stack. I wish I could post the picture. Then in the basement I have a bathroom with a toilet and shower. And he increase the kitchen plumbing to 2''. All the drains were 1 1/2''. Please advise. Thank you

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You can post photos by clicking on the Answer This Question yellow button below your question - then on the Your Answer box that comes up on the new page, click on the leftmost yellow icon in the answer box gray header bar - you can post photos then, in JPG, PNG, or GIF format. If you do so, I will try to see if things look good or out-of-code to me.

Obviously without seeing the routing I can't say much - but if the drain lines are dropping into the vent line that is wrong (though may be how it was done originally). The vent lines from each fixture should come off close to each fixture (distance varies by application and pipe size but generally within 2-3 feet of the fixture), leading up (with some provisos for in-floor routing to the nearest wall it can run up) to connect into the vent pipe, which usually runs pretty much vertically from the main sewer line downstream of the last drain line connection coming into it - so the main sewer gases coming through or from the underground line go up the vent stack, which the individual (or joined together) vent lines from the fixtures connect into, leading to the roof exhaust location. The drain lines run from fixtures through branches into the main drain stack - the liquids should NOT run down vent lines.

If the sewer gsas odor is coming out AROUND the toilet or from edges of flooring say, could be he did not remount that toilet right so you are getting sewer gases coming out of the mounting flange/wax seal area.

If the gas is coming up through the toilet itself,, meaning probably gurgling or bubbling when the toilet bowl first starts refilling until the trap has enough water in it to keep the gases from coming in, then likely you have the liquids going down a vent pipe and the gases are being forced back up to the open (while flushing) toilet passage - or there is something else wrong with the venting such as lack of individual fixture venting which is causing the gas to back through the toilet.

Could also be a bad connection in the new piping - a joint he failed to glue or that cracked or such, causing a leak of liquid (though usually that would bemore urine smelling during flushing) or of gas.

With this new work, did the plumber get a permit and final inspection before the new piping was closed up ? if that was not done, contact the plumber to get it done before you pay him (hopefully you have not paid him ?). If already paid, contact building inspection department - they will usually get on his case and threaten his license if he does not get it inspected and repaired as needed to pass.

Answered 3 years ago by LCD

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