Last month, we took on the tank that this pipe was the vent to. As you can see, there is sediment in the vent pipe. The cause of this was a ground level vent pipe that allowed water and dirt to run in. The inside of the tank also had a significant amount of sludge which is what caused the feed line to clog and the burner to fail.
Be sure to check your fill and vent pipes for exposure to water, dirt or foreign material. Sometimes the pipes can also rust through inside the wall. While you cannot see this, if the the pipes are rusted on either side of the wall, it is worth having checked.
Be sure to check your fill and vent pipes for exposure to water, dirt or foreign material. Sometimes the pipes can also rust through inside the wall. While you cannot see this, if the the pipes are rusted on either side of the wall, it is worth having checked.