How Much Should Septic Vent Pipe Extend Above Roof

This accounts for the 4 inch tapered head of the flashing and the minimum 12 inches of vent.

How much should septic vent pipe extend above roof.

This in turn causes the septic system to back up right to the toilets not a pleasant situation to fix. Upc i 906 1 and 906 2. If a roof is to be used for any purpose other than weather protection the vent shall be extended at least seven 7 feet above the roof. Vent pipes should extend to outdoors above the building roof and should terminate vertically not less than 6 above the roof surface nor more than 24 and must be at least 12 from any vertical surface such as a nearby sidewall.

The septic venting pipe and system provides a septic tank the ability to move gases and air out of the tank when it fills up with waste and liquid volume. This may seem suitable since the only purpose for the stack is to provide air and expel sewer gases. Extensions of vent pipes through a roof shall be terminated at least 12 inches above such roof unless a roof is to be used for any purpose other than weather protection. Measure from the upper end of the connector to the underside of the roof flashing and add 16 inches.

That vent pipe actually pulls septic system odors up through to above the roof line of the home. Above the roof plumbing vent height. The soil pipe also known as the vent stack or stack pipe provides air for the plumbing system. The vent pipe of the plumbing system must extend well above the roof line according to most plumbing codes.

Depending on your region the vent stack may protrude only a few inches above the surface of the roof. Many people think the vent pipe on their roof is to vent the bathroom steam or something of that type. As i recall some plumbing codes state the top of the vent pipe shall be one or two feet higher than a level line 10 feet long from the vent pipe location to the roof. Due to the low pressure in the pipe itself the sewage odors and gases easily find their way out and away from your home.