Plumbing Codes

Overview

Engineering reference data for Plumbing Codes in sanitary drainage.

Key Formulas

Manning's Equation

$Q = \frac{1}{n} A R_h^{2/3} S^{1/2}$

Open channel flow.

Slope

$S = \frac{\Delta h}{L}$

Hydraulic gradient.

Variables

Major Plumbing Codes and Standards

The following are the primary plumbing codes and standards used in the United States. Engineers must verify which specific codes have been adopted in their local jurisdiction before beginning work.

• National Plumbing Code - Developed by the Building Officials and Code Administrators International (BOCA)
• Uniform Plumbing Code (UPC) - Developed by the International Association of Plumbing and Mechanical Officials (IAPMO)
• International Plumbing Code (IPC) - Developed by the International Codes Council (ICC)
• Standard Plumbing Code - Developed by the Southern Building Code Congress International (SBCCI)
• One and Two Family Dwelling Code - Developed by the Council of American Building Officials
• ANSI A40: Safety Requirements for Plumbing - Published by the American National Standards Institute

Local Adoption and International Context

Plumbing codes are not applied uniformly. Key considerations include:

• Local Authority: Cities, counties, or states adopt and often modify national model codes to fit regional needs, climate conditions, and existing infrastructure.
• Engineering Responsibility: The engineer is responsible for verifying and complying with the specific code requirements of the project's jurisdiction.
• Global Variation: Internationally, different countries and regions maintain their own codes. For example, the European Union has harmonized standards, but individual member states may have additional national requirements.

References

• Original Source