Why is my water heater vent pipe leaking?
During the strongest of storms you may have water inside the water heater pan.That water may be coming from your vent system.
Water Heater vent pipes have 4 parts to them.
1)The FLASHING( the transition piece that allows the vent pipe to penetrate through the roof).
2)The VENT COLLAR (this is the donut ring around the vent and sits flushed to the flashing)
3)The VENT CAP this cap is connected at the top of the vent and keeps rain and other elements but allows the release of the water heaters hot exhaust fumes.
4) The VENT pieces. The vent connects all parts together including your water heater. It carries all the water heaters exhaust fumes outside the house.
Remember the vent pipe is exposed to hard elements like sun and wind.
The older they get the more prone to seals drying and breaking, caps getting knocked off by hard winds, birds nest and many other factors.
You should check the your water heater vent system every six months visually. A professional roofer should inspect the vent pipe after a hurricane, if a leak occurs or every 2 years.