Start with the Fixture: Breaking Down Wisconsin Venting Systems

In Episode 4 of Mastering Wisconsin Plumbing, we tackle one of the most complex sections of the Wisconsin Plumbing Code: SPS 382.31 – Vent Systems.

Host Ryan Boggs shares his practical strategy for understanding venting by first classifying fixtures as floor outlet or wall outlet, making it easier to determine which venting systems apply. From individual and common vents to wet vents, circuit vents, and combination drain and vent systems, this episode walks through each method with clarity and field-tested insight.

We also discuss:

• The 1” water column engineering standard
• The importance of definitions like “building drain” and “sewer”
• Why Table 382.31-1 applies to every venting system
• When and how to use wye-pattern fittings

Plus, Ryan introduces an AR tool to help visualize Wisconsin-compliant venting systems directly from your smartphone.

Whether you're in the field, in the classroom, or preparing for an exam—this episode gives you the tools to start seeing venting layouts with greater confidence and precision.

🔗 Referenced Wisconsin Code Sections:

• SPS 381.01 – Definitions (e.g., building drain branch, sewer, fixture drain)
• SPS 382.31 – Vents and Venting Systems
  • Table 382.31-1 – Maximum Length of Trap Arms
  • Table 382.31-7 – Combination Drain and Vent Stack Sizing
• SPS 382.30 – Drainage Fixture Units (DFUs)

📱 Resources & Tools:

• Flowchart: How to read and apply Table 1 of SPS 382.31 https://drive.google.com/file/d/1wLmJgEMmX0jouLZlDOonWMJSmrsRg4Cw/view?usp=sharing
• Augmented Reality Viewer: Explore Wisconsin-compliant venting systems using your smart device - https://p3d.in/CjVGG, https://p3d.in/u41fM, https://p3d.in/mfEQQ
• Contact: plumbout@gmail.com for questions or feedback