The 2025 National Plumbing Code of Canada is published: the changes plumbing owners should know

What was published, and by whom

The short answer: a new edition of the national model plumbing code, released alongside the other 2025 National Model Codes.

The Canadian Board for Harmonized Construction Codes (CBHCC) develops and approves the national codes, and the NRC publishes them. Each province and territory then decides whether to adopt the new edition, when, and with what local changes. That is why a plumber in one province can be working to a different edition than a plumber a few hours' drive away.

As of October 2026, the NRC page tells readers to contact their provincial or territorial official to find out which codes apply where they work. We repeat that advice here: this article summarises a publication, it is not compliance guidance.

The technical changes that matter most to plumbing contractors

The CBHCC's list of significant technical changes for the NPC is short but practical. In plain terms:

• Condensate drainage. The code now defines a "condensate drainage system" and adds requirements for one. It also revises the definitions of "clear-water waste" and "drainage system" so condensate is clearly covered.
• New defined terms. "Washroom", "public washroom", "private washroom" and "macerating toilet system" are now defined, and "public use" and "private use" were revised.
• Roof and storm drainage. Requirements for some roof configurations are clarified, including scuppers and emergency roof drains, with more design options.
• Labelled drain lines. Storm and sanitary drainage systems must be labelled by application, so contractors and inspectors can tell them apart.
• Wall carriers and oil separators. New referenced standards set minimum requirements for water-closet wall carriers and for oil separators, sometimes called oil interceptors.
• Protecting potable water. References to NSF/ANSI/CAN 61-2020 address chemical contamination, and CSA B214:21 is referenced where potable water serves as the fluid in an open-loop hydronic heating system.
• Mechanical couplings. A referenced AWWA standard covers plain-end mechanical couplings in pressure applications.
• Neutralization tanks. Dilution is removed as a way to treat corrosive or acid waste; neutralization stays.

When it could reach your province

Timing depends entirely on adoption, and it varies.

Alberta is a useful example of how unclear this can look from the outside. The province's plumbing codes page still showed the NPC 2020, in force since April 1, 2023, when we checked on 2026-10-22. The trade publication Mechanical Business reported on 2026-04-10 that Alberta will bring NPC 2025 into force on January 1, 2027. We could not find that date on an official Alberta page, so treat it as reported, not confirmed, and watch Alberta's notices. Our Alberta page tracks the regulators there.

Other provinces build their own plumbing codes on the national text. British Columbia's current plumbing code, for instance, combines the NPC 2020 with BC amendments, as we explained in our BC Codes 2024 story.

What plumbing owners can do now

You don't need to change anything on site today. You can get ready so the change doesn't cost you jobs or margin.

1. Download the free PDF and have a lead hand or service manager read the condensate and drainage sections.
2. Check your quote templates. If condensate work becomes more defined, line items for condensate piping and disposal may need to be clearer.
3. Talk to your supplier about labelling products for storm and sanitary lines before you need them.
4. Plan training time for apprentices and journeypersons once your province announces adoption.
5. Write it down for customers. When the code is adopted where you work, a plain explanation of what changed and why helps homeowners accept a line item they didn't see on their last quote.

The marketing angle: answer the question before your competitor does

Code changes create search demand. Homeowners and property managers read a news story, then search "do I need a condensate pump" or "new plumbing code requirements" and land on whoever explained it clearly. A short, accurate page on your own site, written in plain language and dated, can earn that visit.

The rules for that kind of content are simple: link the official source, give the date, never promise compliance, and tell readers to confirm with the authority having jurisdiction. Our industry content service does exactly this for plumbing companies, and the newsroom collects every story we have verified. If you want to talk about how to use code news in your marketing, call, text or email.