OBC 2024 Standards for Copper and Brass Piping | Expert Guide by empcontracting.ca Inc.
Sarah's Expert Insight
OBC Compliance Specialist
"Correctly identifying the application for Type M versus Type L copper is a common hurdle in residential renovations across London, Oakville, and Muskoka; using the wrong temper underground is a frequent cause of inspection failure. At empcontracting.ca Inc. your construction contractor in London, Ontario, we emphasize the use of hard-temper K or L for above-ground longevity, ensuring your plumbing infrastructure exceeds OBC standards for decades of reliable service."
Understanding Non-Ferrous Pipe and Fittings under OBC 7.2.7
The 2024 Ontario Building Code (OBC) outlines rigorous standards for the use of copper and brass in plumbing systems. As empcontracting.ca Inc. your construction contractor in London, Ontario, we ensure that every material used on your project meets these specific safety and durability requirements. This section governs the installation of non-ferrous materials in water distribution and drainage systems.
Technical Specifications for Copper and Brass Pipe
According to OBC 7.2.7.1 and 7.2.7.2, all copper and brass pipes must conform to high-level ASTM and ASME standards. Copper pipe must meet ASTM B42, while seamless red brass pipe must adhere to ASTM B43. Furthermore, flanges and flanged fittings are required to meet ASME B16.24 standards to ensure they can withstand the pressure classes (150 through 2500) required for modern Ontario builds.
Permitted Uses and Restrictions (Table 7.2.7.4)
Not all copper tubing is created equal. The OBC distinguishes between Types K, L, M, and DWV (Drainage, Waste, and Vent) based on their temper and thickness:
- Underground Water Distribution: Only Type K and L soft temper copper tubes are permitted for underground use.
- Above-ground Systems: Type M (hard temper) is frequently utilized for above-ground water distribution, but it is not permitted for underground installations.
- Drainage Restrictions: Per OBC 7.2.7.3, brass or bronze threaded water fittings are strictly prohibited from being used in a drainage system to maintain proper flow and prevent mechanical failure.
Compliance with ASTM and ASME
Every fitting and tube, from ASTM B88 water tubes to ASTM B306 drainage tubes, must be verified for its specific application. Using the incorrect type of copper tube can lead to premature corrosion, pinhole leaks, and failure to pass municipal building inspections.
Disclaimer: This content is generated from the Ontario Building Code for educational purposes. Always consult with a licensed professional engineer or your local building department before starting any construction project in London, Ontario.