Vents
11 articles
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Air Admittance Valves Are Allowed Only Under IRC Conditions
Are air admittance valves allowed by IRC 2021?
P3114.1
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At Least One Plumbing Vent Must Terminate Outdoors
Does every house need a plumbing vent through the roof?
P3102.1
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Bathroom Groups Can Use IRC Wet Venting When the Layout Fits
Can a toilet, shower, tub, and lavatory share a wet vent?
P3108.1
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Every Trapped Fixture Needs a Protected Vent
Does every plumbing fixture need a vent under IRC 2021?
P3101.2.1
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Individual and Common Vents Serve Different IRC Layouts
What is the difference between an individual vent and a common vent?
P3106, P3107
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Island Sinks Need a Special IRC Venting Method
How do you vent a kitchen island sink under IRC 2021?
P3112.1
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Roof Plumbing Vents Need the IRC Minimum Termination Height
How high does a plumbing vent have to be above the roof?
P3103.1
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Trap Arms Must Reach the Vent Within the IRC Distance Limit
How far can a P-trap be from the vent under IRC 2021?
P3105.1
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Vent Pipe Size Is Based on IRC Vent Sizing Rules, Not Guesswork
What size does a plumbing vent pipe need to be?
P3113.1
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Vent Terminals Must Stay Clear of Windows, Doors, and Air Intakes
How far does a plumbing vent need to be from a window or air intake?
P3103.5
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Waste Stack Venting Is Limited to IRC-Approved Fixture Layouts
Can a drain stack also be the vent for fixtures?
P3109
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