That I can be right about something I haven't the technical expertise to pronounce upon.
Gutters were recently redone on our long term rental. Builder removed the top half of the soil pipe, which had previously followed a fair way up the slope of the roof, because he said it was in the way. Replaced it with a vertical pipe, pvc atop the old cast iron. He said it was the legal height, but I had a bad feeling about this, thinking whoever had done it the way it was had probably done it for a good reason.
I didn't even know what a soil pipe was until last week.
The day after the builders left we got a bad smell in the house. Fortunately it dissipated, but I just knew it was the new pipe. When you live in a place for 20 years and a problem crops up right after work is done, it's not a big leap of logic, is it.
Got the smell again a few days ago. We figured the fact that both days were windy might have something to do with it; a very local weather system that the previous pipe been configured to thwart.
Landlord sent a drainage expert (happy to stop by on a Sunday!) who has just confirmed my suspicions.