â¦about tires, XL really means extra load. These tires can use higher air pressure to support more weight than a standard tire of the same size. If you want to see whether your current tires are standard or extra load, you can check the service description on the tire's sidewall. An extra load tire willâ¦.
Plumbing vents which have been accidentally closed off or blocked: some plumbing vents include a. screen which can slide down, closing off the vent and causing sewer gas backups in the building. We've. also found plumbing bents blocked by wasp nests, birds, and once even a frog.
Other ways sewer gas can get into your home include: 1  A dry trap. If there is a trap in a drain line that is not often used, the water in the trap may evaporate, breaking the trap seal. 2  A damaged trap. Obviously, if the trap is cracked and allows the water to run out, the trap seal is again lost. 3  A damaged drain line.