If you’re a contractor, inspector, or homeowner in Indiana working on a plumbing project approved between 2006 and 2008, you’ve likely encountered references to the 2006 International Plumbing Code 2nd Printing Indiana Edition. But what exactly is it—and why does it still matter today? This guide breaks down everything you need to know about this specific code version, its relevance, and how to use it correctly while staying compliant with state regulations.
What Is the 2006 International Plumbing Code 2nd Printing Indiana Edition?
The 2006 International Plumbing Code (IPC) 2nd Printing Indiana Edition is a state-adopted adaptation of the model code published by the International Code Council (ICC). While the base 2006 IPC sets national standards for plumbing system design, installation, and inspection, Indiana’s edition includes state-specific amendments tailored to local climate, infrastructure, and regulatory needs.
According to the Indiana Department of Homeland Security (IDHS), which oversees building safety, this version was officially adopted on April 2, 2007, and remained in effect until superseded by the 2008 Indiana Building Code updates.
💡 Did You Know?
Indiana modifies ICC model codes to address regional concerns—like frost depth for pipe burial or water hardness affecting fixture durability.
For accuracy, always refer to the official Indiana Administrative Code (Title 675, Article 14) when interpreting plumbing requirements during this period.
Why Does the 2nd Printing Matter vs. the 1st?
Many professionals assume all printings of a code year are identical—but that’s not true. The 2nd printing often includes:
- Technical corrections (e.g., updated pipe sizing tables)
- Editorial clarifications (removing ambiguous language)
- Minor errata fixes identified after initial release
For example, in the 2006 IPC 2nd printing, Section 312.2 (Testing of Drain, Waste, and Vent Systems) was revised to clarify acceptable air pressure testing durations—critical for inspectors verifying compliance.
| Error Corrections | Limited | Comprehensive |
| Official Adoption in IN | Not used | Adopted statewide |
| Availability | Rare | Distributed by IDHS |
Always confirm you’re using the 2nd printing if your project falls under Indiana’s 2006–2008 code cycle. Using an outdated version could lead to failed inspections or costly rework.
Key Differences Between National IPC and Indiana’s Edition
Indiana didn’t just adopt the IPC—it customized it. Here are three major deviations relevant to plumbers and designers:
- Backflow Prevention Requirements
Indiana mandates stricter backflow protection for irrigation systems than the base IPC, especially in areas with high groundwater contamination risk (per IDHS Bulletin #07-03). - Fixture Unit Calculations
The state adjusted drainage fixture unit (DFU) values for commercial dishwashers and laundries to reflect higher usage patterns in Midwestern facilities. - Venting in Cold Climates
Due to freezing risks, Indiana requires extended vent terminals above rooflines in northern counties—a detail absent in the national code.
These changes highlight why relying solely on the generic 2006 IPC can be risky. Always cross-reference with the Indiana-specific amendments, available through the Indiana Professional Licensing Agency (PLA) .
How to Access the Official Document
While physical copies are rare, you can legally access the 2006 International Plumbing Code 2nd Printing Indiana Edition through:
- Indiana State Library: Offers reference-only copies in Indianapolis.
- ICC Safe Online Store: Sells historical code versions (search “2006 IPC Indiana”).
- Local Building Departments: Many retain archived code books for public review.
⚠️ Avoid free PDFs from unofficial sites—they may lack Indiana amendments or contain malware.
For authoritative context on plumbing codes generally, see the International Plumbing Code entry on Wikipedia .
Step-by-Step: Verifying Compliance for Retroactive Projects
If you’re renovating a building permitted under the 2006 code cycle, follow these steps:
- Confirm Permit Date
Check the original building permit. If issued between April 2, 2007 – March 31, 2009, the 2006 IPC Indiana Edition applies. - Obtain the Correct Code Version
Use only the 2nd printing with Indiana amendments—not the base ICC version. - Review State Bulletins
IDHS issued interpretive bulletins (e.g., #07-01 through #08-12) clarifying gray areas. These carry legal weight. - Consult a Licensed Indiana Plumber
For complex retrofits (e.g., adding fixtures to old DWV systems), professional input prevents violations. - Schedule Inspection Early
Local inspectors expect documentation showing adherence to the exact code in force at permit issuance.
Following this process reduces delays and ensures your work meets historical compliance standards—even years later.
Common Mistakes When Using This Code Edition
Even experienced contractors slip up. Watch out for:
- Assuming Uniformity: Thinking Indiana’s code = national IPC.
- Ignoring Printing Version: Using 1st printing specs for vent sizing.
- Overlooking Local Amendments: Some cities (e.g., Fort Wayne) added extra rules.
- Misapplying Modern Standards: Upgrading to PVC without checking if cast iron was required originally.
One real-world case: In 2010, a Bloomington remodel failed inspection because the plumber used 2009 trap arm lengths—violating the 2006 code’s shorter maximum distance rule (Section 1002.2).
FAQ Section
Q1: Is the 2006 IPC Indiana Edition still enforceable today?
A: Only for buildings permitted under its cycle (roughly 2007–2009). New projects must follow the current Indiana Building Code (based on 2020 IPC as of 2025). However, existing systems must be maintained per their original code unless altered.
Q2: Where can I buy an authentic copy?
A: The ICC Store (www.iccsafe.org ) sells digital and print versions labeled “Indiana Edition.” Verify it specifies “2nd Printing” in the copyright page.
Q3: Do I need to follow Indiana amendments if I’m licensed in another state?
A: Yes. Any plumbing work in Indiana—regardless of contractor origin—must comply with Indiana’s adopted codes. Out-of-state licenses don’t exempt you.
Q4: Are there online training courses for this code version?
A: While most courses focus on current codes, the Indiana Construction Codes Academy occasionally offers archival workshops. Check their calendar at www.in.gov/dhs/building-safety .
Q5: Can I use newer materials if they weren’t listed in the 2006 code?
A: Possibly—if approved via alternate material request (AMR) to the local building official. But default to materials explicitly permitted in the 2006 Indiana IPC.
Q6: How do I cite this code in legal or insurance disputes?
A: Reference it as: “2006 International Plumbing Code, 2nd Printing, Indiana Edition, adopted per Indiana Administrative Code 675 IAC 14.” Include the exact section number (e.g., 403.3).
Conclusion
Understanding the 2006 International Plumbing Code 2nd Printing Indiana Edition isn’t just about reading rules—it’s about ensuring safety, avoiding fines, and honoring the regulatory framework that shaped Indiana’s built environment during a critical growth period. Whether you’re restoring a historic property or resolving a compliance dispute, having the right code version makes all the difference.
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Stay code-compliant, stay safe. 💧🔧
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