National Plumbing Code of Canada: 2025

The NPC includes provisions for the safe installation of potable water systems, the removal of wastewater to municipal or private sewage water systems, and water use efficiency. The 2025 edition of the NPC includes the following updates: - Introduction of requirements for condensate drainage systems to prevent leaks, odours and mould - Clarification of the requirements for roof drainage systems, while providing additional design options Introduction of requirements to protect potable water from chemical contamination - Removal of dilution as an option for treating corrosive or acid waste, while retaining neutralization, to better protect plumbing infrastructure and the environment