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Regarding Vent Stacks [ from the `06 IRC ]:
`06 IRC, P3102.3 - Size:
"The required vent shall be sized in accordance with Section P3113.1 based on the required
size of the building drain."
`06 IRC, P3113.1 - Size of Vents:
"The minimum required diameter of individual vents, branch vents, circuit vents, vent stacks
and stack vents shall be at least one-half the required diameter of the drain served........The
required size of the drain shall be determined in accordance with Chapter 30...................Vent
pipes shall be not less than 1¼ inches (32 mm) in diameter.....................Vents exceeding 40
feet (12,192 mm) in developed length shall be increased by one nominal pipe size for the
entire developed length of the vent pipe."
'06 IRC, P3102.1 - Required Vent Extension:
"The vent system serving each building drain shall have at least one vent pipe that
extends to the outdoors."
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