• Yer it’s wired that it’s only one drain, There could be a jagged edge somewhere down the pipe that could have caught a mass of something that’s slowly rotting away, you can get hand cranked pipe snake there a few metres long, probably 30bucks, might get you outta trouble,

    •  YⓄ乙   ( @yoz@aussie.zone ) OP
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      15 months ago

      I am sure the smell is from the sewer and not something rotting. I have noticed when its windy outside that when I notice the smell so definitely sewer. How can I check if theres a P trap in there ? I tried using a torch but can’t really see properly. Should I just cut open the floor drain?

      • Is there an outlet vent outside? Check to see that it’s not blocked by something, insect nest, or spider web or something, that’s the only place I can think of that the wind cause possibly get in. If you can get under the house you can see what is going on, maybe a inspection camera? You’d feel it with a drain snake.