§ Chapter 31 IRC 2024
Vents
14 entries from Chapter 31 of IRC 2024, organized by section number. Each entry covers what the code requires, why it exists, what inspectors look for, and common mistakes.
§ 01 Sections
All 14 entries.
Sorted by section number. Click any row for the full entry — answer, requirements, edition diff, related sections.
Section
Title
Question
P3002
IRC 2024 Vent Pipe Materials: PVC, ABS, and Cast Iron for Plumbing Vents
P3002
What materials are approved for plumbing vent pipes under IRC 2024, and can you switch between PVC and ABS?
What materials are approved for plumbing vent pipes under IRC 2024, and can you switch between PVC and ABS?
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P3102
IRC 2024 Stack Vent vs Vent Stack: Understanding the Two Types of Stacks
P3102
What is the difference between a stack vent and a vent stack under IRC 2024, and when is each required?
What is the difference between a stack vent and a vent stack under IRC 2024, and when is each required?
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P3103
IRC 2024 Vent Stack Termination: Roof Penetration Height and Clearance Rules
P3103
How high must a plumbing vent stack extend above the roof, and what clearances are required from windows and air intakes under IRC 2024?
How high must a plumbing vent stack extend above the roof, and what clearances are required from windows and air intakes under IRC 2024?
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P3103
IRC 2024 Vent Stack Through Roof: Flashing, Height, and Frost Closure Prevention
P3103
What are the IRC 2024 requirements for vent pipes penetrating the roof, including flashing, height, and frost closure?
What are the IRC 2024 requirements for vent pipes penetrating the roof, including flashing, height, and frost closure?
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P3105.1
IRC 2024 Individual Vent: When Each Fixture Needs Its Own Vent Pipe
P3105.1
What are the IRC 2024 requirements for an individual vent, and when is it the required venting method?
What are the IRC 2024 requirements for an individual vent, and when is it the required venting method?
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P3105.1
IRC 2024 Toilet Vent: Why the Toilet Needs a Dedicated 3-Inch Vent
P3105.1
What does IRC 2024 require for venting a toilet, and can a toilet share a vent with a lavatory?
What does IRC 2024 require for venting a toilet, and can a toilet share a vent with a lavatory?
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P3107
IRC 2024 Common Vent: Two Fixtures Sharing One Vent Pipe
P3107
When does IRC 2024 permit two fixtures to share a single common vent pipe, and what are the limitations?
When does IRC 2024 permit two fixtures to share a single common vent pipe, and what are the limitations?
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P3109
IRC 2024 Circuit Vent: Venting Multiple Fixtures in a Battery
P3109
How does IRC 2024 circuit venting work, and when can multiple fixtures share one circuit vent?
How does IRC 2024 circuit venting work, and when can multiple fixtures share one circuit vent?
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P3109
IRC 2024 Island Venting: How to Vent a Kitchen Sink in an Island
P3109
How do you vent a kitchen sink in an island under IRC 2024 when there is no adjacent wall for a vent pipe?
How do you vent a kitchen sink in an island under IRC 2024 when there is no adjacent wall for a vent pipe?
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P3111
IRC 2024 Combination Drain and Vent System (Sovent): Design Requirements
P3111
What does IRC 2024 require for combination drain and vent systems like Sovent or single-stack systems?
What does IRC 2024 require for combination drain and vent systems like Sovent or single-stack systems?
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P3112
IRC 2024 Island Fixture Vent: Venting Kitchen Islands and Bathroom Islands
P3112
How does IRC 2024 require island fixtures like kitchen island sinks to be vented when no adjacent wall is available?
How does IRC 2024 require island fixtures like kitchen island sinks to be vented when no adjacent wall is available?
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P3113
IRC 2024 Vent Pipe Sizing: Minimum Diameter by DFU Load
P3113
How does IRC 2024 determine the minimum vent pipe diameter based on fixture units and developed length?
How does IRC 2024 determine the minimum vent pipe diameter based on fixture units and developed length?
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P3114
IRC 2024 Air Admittance Valve (AAV): When You Can Use a Cheater Vent
P3114
When does IRC 2024 allow an air admittance valve (AAV) instead of a conventional vent pipe?
When does IRC 2024 allow an air admittance valve (AAV) instead of a conventional vent pipe?
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P3114
IRC 2024 Air Admittance Valves: Where AAVs Are Allowed and Where They Are Not
P3114
Where does IRC 2024 permit air admittance valves, and what restrictions apply to their use?
Where does IRC 2024 permit air admittance valves, and what restrictions apply to their use?
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