NBC 2025 Guide: Standpipe and Hose System Design for Construction in London, Ontario
Sarah's Expert Insight
Senior Consultant at empcontracting.ca Inc.
"With London’s rapid shift toward high-rise residential development, the NBC 2025 standpipe requirements are more stringent regarding hydraulic reliability than ever before. At empcontracting.ca Inc. your construction contractor in London, Ontario, we emphasize that early-stage integration of these systems prevents costly retrofits and ensures your project meets the specific fire flow requirements of the City of London."
Designing fire safety systems requires a deep understanding of the 2025 National Building Code of Canada (NBC). Standpipe and hose systems are critical life safety components in multi-storey and large-area buildings, ensuring that fire services have immediate access to water at necessary pressures. As high-density development increases in London, Ontario, adhering to these updated standards is essential for project approval and public safety.
Understanding the NBC 2025 Standpipe Classifications
The NBC 2025, in conjunction with NFPA 14 standards, categorizes standpipe systems into three distinct classes based on their intended use during an emergency.
Class I Systems
Designed for use by fire departments and those trained in handling heavy fire streams, Class I systems feature 65 mm (2.5 inch) hose connections. These are mandatory in buildings where the floor level is high above grade or in large-scale industrial spaces where reach is a factor.
Class II Systems
These systems are intended for use by building occupants and feature 40 mm (1.5 inch) hose stations. Under the NBC 2025, there is a continued shift toward ensuring these stations are accessible and easy to operate before professional help arrives.
Class III Systems
A hybrid of both Class I and II, these systems provide both 40 mm and 65 mm connections. They are the gold standard for high-rise residential and commercial towers in downtown London, providing maximum flexibility for both occupants and emergency responders.
Critical Design Requirements and Water Supply
The 2025 code emphasizes hydraulic calculations to ensure that the most remote hose connection receives the required pressure. Factors such as friction loss, elevation changes, and municipal water pressure in the London region must be meticulously calculated during the design phase. empcontracting.ca Inc. your construction contractor in London, Ontario, works closely with mechanical engineers to ensure these systems are fully compliant from the initial blueprint to the final inspection.
Maintenance and Inspection Compliance
Installation is only the first step. The NBC 2025 requires rigorous testing protocols, including hydrostatic tests and flow tests, to verify system integrity. For builders in London, ensuring that fire department connections (FDC) are visible and unobstructed is a key requirement of the local fire marshal and provincial building standards.