Secret killers in your drain. Part 3

And what if somebody's having a strong odor come from their drains? Well, make sure they're priming their P-traps. Say they have a strong smell coming from a shower, but they haven't used it in a while. Probably the water's dried up out of it, or the water's dry in the bathroom sink. There's like so many factors to that. There's really not a simple answer, unfortunately. But you could have something as serious as a broken pipe, or something as simple as not enough water in the P-trap. And the sewer gas are just coming back up. The sewer gas can just travel right back up into your home. Really? Absolutely. Absolutely.