• Codes
  • Features

    Features Overview

    Go to features
    Reference

    Reference.

    A reliable and up-to-date source of codes.
    Research

    Research.

    Rapidly and efficiently calculate project parameters.
    Collaboration

    Collaboration.

    Get everyone on the same page and streamline code research.
    Workflows
    Architects
    Architects
    General Contractors
    General Contractors
    Building Official & Plans Examiners
    Building Official & Plans Examiners
    Inspectors
    Inspectors
    Owners
    Owners
    Subcontractors
    Subcontractors
    Code Consultants
    Code Consultants
  • Pricing
  • Login
  • Sign Up
Sign Up
Login
  • Code Library
  • Features
  • Pricing
  • About
  • Careers
  • Help
  • Contact
  • Terms
  • Privacy
Sign Up
Upgrade to Premium
Code calculators: Code Calculators automatically generates a detailed list of requirements.
REFERENCE
Amendment Styling
Industry-leading search
Code diagrams
RESEARCH
Code calculators
Filter by topic
Code compare
Code sheet exports
COLLABORATION
Team projects
Bookmarks
Comments
START 2 WEEK FREE TRIAL
Have an account? Sign in
// CODE SNIPPET

Section 903 Outdoor Vent Extension

Plumbing Code 2009 of Alabama > 9 Vents > 903 Outdoor Vent Extension
JUMP TO FULL CODE CHAPTER

903.1 Required Vent Extension

The vent system serving each building drain shall have at least one vent pipe that extends to the outdoors.

903.1.1 Installation

The required vent shall be a dry vent that connects to the building drain or an extension of a drain that connects to the building drain. Such vent shall not be an island fixture vent as allowed by Section 913.

903.1.2 Size

The required vent shall be sized in accordance with Section 916.2 based on the required size of the building drain.

903.2 Vent Stack Required

A vent stack shall be required for every drainage stack that has five branch intervals or more.
Exception: Drainage stacks installed in accordance with Section 910.

903.3 Vent Termination

Vent stacks or stack vents shall terminate outdoors to the open air or to a stack-type air admittance valve in accordance with Section 917.

903.4 Vent Connection at Base

Every vent stack shall connect to the base of the drainage stack. The vent stack shall connect at or below the lowest horizontal branch. Where the vent stack connects to the building drain, the connection shall be located downstream of the drainage stack and within a distance of 10 times the diameter of the drainage stack.

903.5 Vent Headers

Stack vents and vent stacks connected into a common vent header at the top of the stacks and extending to the open air at one point shall be sized in accordance with the requirements of Section 916.1. The number of fixture units shall be the sum of all fixture units on all stacks connected thereto, and the developed length shall be the longest vent length from the intersection at the base of the most distant stack to the vent terminal in the open air, as a direct extension of one stack.

Related Code Sections


Section 903 Vents, Outdoor Vent Extension
The vent system serving each building drain shall have at least one vent pipe that extends to the outdoors ...
Plumbing Code 2009 of Alabama > 9 Vents > 903 Outdoor Vent Extension
Section 904 Vents, Outdoor Vent Extensions
The vent system serving each building drain shall have not less than one vent pipe that extends to the outdoors ...
Plumbing Code 2021 of Alabama > 9 Vents > 904 Outdoor Vent Extensions
Section 904 Vents, Outdoor Vent Extensions
The vent system serving each building drain shall have not less than one vent pipe that extends to the outdoors ...
Plumbing Code 2015 of Alabama > 9 Vents > 904 Outdoor Vent Extensions
904.3 Vents, Vent Termination
Vent stacks or stack vents shall terminate outdoors to the open air or to a stack-type air admittance valve in accordance with Section 918 ...
Plumbing Code 2021 of Alabama > 9 Vents > 904 Outdoor Vent Extensions > 904.3 Vent Termination
904.3 Vents, Vent Termination
Vent stacks or stack vents shall terminate outdoors to the open air or to a stack-type air admittance valve in accordance with Section 918 ...
Plumbing Code 2015 of Alabama > 9 Vents > 904 Outdoor Vent Extensions > 904.3 Vent Termination
Help Contact Us Privacy Terms
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
Code Compare
Code Compare
Highlight differences between any two building codes.
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
VISIT PRICING
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL PRICING