2024 Ontario Building Code Guide: Plumbing Pipe Fittings and Tubular Trap Regulations
Sarah's Expert Insight
OBC Compliance Specialist
"Adherence to these specific fitting restrictions is critical for preventing chronic drainage issues in high-density builds in London or custom cottages in Muskoka. As your construction contractor in London, Ontario, empcontracting.ca Inc. ensures that every elbow radius and trap location is optimized for both OBC compliance and long-term serviceability in Oakville and beyond."
Understanding the complexities of the 2024 Building Code Compendium is essential for any successful renovation or new build. As empcontracting.ca Inc. your construction contractor in London, Ontario, we prioritize compliance with Part 7 of the OBC to ensure the longevity and safety of your plumbing systems.
7.2.3.3. Tubular Traps and Accessibility
According to OBC 7.2.3.3., tubular metal or plastic traps conforming to ASME A112.18.2 / CSA B125.2 must be installed exclusively in accessible locations. This ensures that maintenance and clearing of blockages can be performed without damaging the building's structure.
7.2.4. Pipe Fitting Restrictions
7.2.4.1. T and Cross Fittings
The code strictly prohibits the use of T-fittings in drainage systems, except when connecting a vent pipe. Furthermore, cross fittings are entirely banned within drainage systems to prevent cross-contamination and flow interference.
7.2.4.2. Sanitary T Fittings and Flow Dynamics
Specific restrictions apply to double sanitary T fittings, particularly regarding urinal fixture drains without upper cleanouts. Additionally, any fitting or connection that reduces flow by more than 10% or intercepts solids is prohibited, ensuring optimal hydraulic performance.
7.2.4.3. 90° Elbows in Sanitary Drainage
For pipes of NPS 4 or less, 90° elbows must have a center-line radius at least equal to the pipe size. Exceptions are made for:
- Changing direction from horizontal to vertical in the flow direction.
- Trap arm entries into walls.
- Connections for pre-engineered wastewater heat recovery systems.
7.2.4.4. Restricted Use of Double Fittings
In nominally horizontal soil or waste pipes, the installation of double Y, double TY, double T, or double waste fittings is strictly forbidden to prevent backflow and drainage turbulence.
7.2.4.5. Standards for Assembled Piping
All pipe and tubing assemblies intended for drain, waste, and venting (DWV) systems must utilize fittings that conform strictly to Table 7.2.4.5 of the Ontario Building Code.
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.