Strong sewage smells are a telltale sign that your toilet vent pipe may be clogged. One of the main jobs of vent pipes is to get rid of those nasty odors and gasses, so if you smell something off, it's time to check it out. If there is a clog in the plumbing vent, those sewer gasses can't escape properly.,
Bad smells – If your vent line is clogged, water may not flow properly through your drain system. As a result, the p-traps under your sinks or toilets may become dry and sewer gas may accumulate, causing a foul odor throughout your home.
Causes of Plumbing Vent Odors:nnYou get odors in plumbing from what's inside the pipes, so if you have a clog, the sludge inside the pipe can be causing the foul odor. It doesn't have to be human waste, it can come from hair, soap, skin cells, body washes and other stuff that makes its way into the drain.
A sewer smell outside your house can mean that the city sewer is backed up. But if the smell is constantly present it can have to do with your roof leader line outlets, or area drains. Although storm sewer systems should not contain sewer gases, sanitary and combined sewer systems do.Jun 23, 2014
If you notice sewer smell coming from your septic tank vent, don't assume that you have serious problems with your septic system. As we mentioned earlier, hydrogen sulfide is a normal by-product of the breakdown of wastes occurring within your septic system.