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.
Floor drains are built with a trap that is designed to be filled with water in order to block sewer/methane gases from venting upward. Whether the drain has a pitch or a p trap, this trap can dry out allowing sewer odors to travel back up the piping into the air we breathe, and smell.