The venting must be vertical or upward sloping so that the hot exhaust rises up through the venting to exit your home. Making sure that your home has a properly working vent system is imperative when installing a standard atmospheric vent with your water heater.

How do you know if your hot water heater is venting properly?

Quote from the video:
Quote from Youtube video: Into the vent and out the chimney. That's good that means we're venting if for any reason. You feel any warm or moist air or coming back at you that means this vent is not venting properly.

How do you vent a water heater into the roof?

Quote from the video:
Quote from Youtube video: This will be sealed up on top to prevent water from coming down into the on the sides of the flue pipe. Itself.