UPC vs IPC Plumbing Code Comparison

The Uniform Plumbing Code (UPC) and International Plumbing Code (IPC) use different approaches for fixture units, venting, drainage sizing, and system design.

Common Differences

• Drain fixture unit assignments
• Wet venting rules
• Pipe sizing allowances
• Cleanout requirements
• Trap and venting provisions

Comparison tools and calculators are being expanded.