Imagine this scenario. A contractor sources butterfly valves for a Toronto high-rise from an American supplier. The valve label says “UL Listed, FM Approved” — two credible approval marks that would satisfy any US project. The submittal goes to Toronto Fire Services, and the plan reviewer rejects it. The reason: the valve is not ULC Listed.
That rejection feels arbitrary until you understand the structure of fire protection approvals in North America. UL, FM, and ULC are three different organizations with three different roles, and Canada treats them differently than the US does. The mistake of assuming “UL Listed” is always good enough is responsible for an enormous share of rejected fire protection submittals in Canadian projects.
This article explains what each approval means, when it applies, and how to specify listings correctly for a Canadian project. It’s written for contractors, mechanical and fire protection engineers, spec writers, and anyone preparing a fire protection submittal that has to survive an AHJ review north of the border.
Meet the Three Organizations
Start by understanding what UL, FM, and ULC actually are. They’re often lumped together, but they have distinct histories, geographies, and purposes.
Underwriters Laboratories (UL)
Founded in 1894 and headquartered in Northbrook, Illinois, UL is a safety-focused product certification organization. Its origin lies in evaluating electrical devices for early insurance underwriters, and over more than a century it has become the default US standard for fire protection product listings.
UL develops its own standards and evaluates products against them. In fire protection, the standards most often referenced include UL 1091 for butterfly valves, UL 262 for gate valves, UL 199 for sprinklers, and UL 448 for centrifugal fire pumps. A product that passes UL evaluation and ongoing follow-up inspections earns the right to carry the UL Listed mark.
UL Listing, by itself, is a US certification. It does not automatically confer Canadian acceptance.
FM Approvals (FM Global)
FM Approvals is the product certification arm of FM Global, an insurance company headquartered in Johnston, Rhode Island. FM Global’s business is insuring large commercial and industrial properties against fire and other hazards, and FM Approvals evaluates products against loss prevention standards designed to reduce the likelihood and severity of those losses.
FM Approvals uses its own datasheets — documents such as FM 1120/1130 for butterfly valves, FM 1112 for check valves, and FM 1321 for fire pumps. The tests tend to be more stringent than UL’s in specific performance areas. An FM Approved butterfly valve, for example, may be subjected to extended pressure-cycling, corrosion, and fire-exposure tests beyond what UL 1091 requires.
FM Approval is not a substitute for UL or ULC Listing. It is an additional credential. Projects insured by FM Global typically require FM Approved components on top of the base listing, because the insurance policy language demands it.
Underwriters Laboratories of Canada (ULC)
ULC was founded in 1920 and headquartered in Toronto. Today it operates as part of UL Solutions, but it maintains its own standards development process and Canada-specific product certification program.
ULC develops the CAN/ULC standard series, which mirrors many UL standards but adapts them to Canadian construction practice, climate, and code structure. In fire protection, examples include CAN/ULC-S543 for check valves (and gate and butterfly valves under the umbrella), CAN/ULC-S544 for gate valves, and CAN/ULC-S552 for the inspection and testing of water-based fire protection systems.
A ULC Listed product has been evaluated against a CAN/ULC standard by an SCC-accredited certification body. That detail matters, and it’s the key to understanding what Canada accepts.
The Cardinal Rule: What Canada Actually Accepts
The National Fire Code of Canada 2020, in Section 6.1.1.2, requires that fire protection equipment be listed by a certification organization accredited by the Standards Council of Canada (SCC).
That sentence is the entire rule. Everything else follows from it.
Three organizations have SCC accreditation in the fire protection product space:
- ULC (through UL Solutions Canada)
- Intertek (through the ETL-C mark)
- CSA Group (where the specific product category is within their accreditation scope)
UL by itself — the US certification alone, without a parallel Canadian evaluation — does not meet the SCC-accreditation requirement. That’s why a “UL Listed” American butterfly valve gets rejected in Toronto while an apparently similar “cULus Listed” valve passes. The difference isn’t in the physical product; it’s in which standards the product was evaluated against and which certification body did the evaluating.
The cULus Shortcut
UL offers a single program called cULus that evaluates products against both UL and CAN/ULC standards simultaneously. A product that passes cULus gets a mark that shows “c” on the left (for Canada) and “us” on the right (for the United States) flanking the UL symbol.
A cULus Listed product is acceptable in both countries. You’ll see this mark on most mainstream fire protection products sold into North America because manufacturers want to serve both markets without maintaining two separate certification programs. For Canadian projects, cULus is the most common and most defensible listing to specify.
How to Write a Canadian Spec Line That Won’t Get Rejected
Getting the listing right on paper prevents the rejection on site. Four disciplines make Canadian specifications defensible.
Nommez explicitement l'annonce. Don’t write “UL Listed.” Write “cULus Listed to UL 1091 and CAN/ULC-S543, 175 psi minimum working pressure.” The second version tells the plan reviewer exactly which standard and which program applies.
Require the listing card in the submittal package. A data sheet from the manufacturer is not proof of listing. The listing card — the document issued by the certification body tying a specific model number to a specific standard — is the defensible reference. Require a copy to appear in the submittal package.
Specify FM Approval separately when it’s required. FM Approval is not implied by UL or cULus. If the project is insured by FM Global or the owner has a policy requiring FM Approved fire protection, add “and FM Approved” as a separate line. Don’t assume it’s bundled.
Don’t accept “equivalent to” substitutions on listings. A contractor substitution request that says “equivalent to cULus Listed” is not acceptable. Either the substitute product carries an SCC-accredited listing, or it doesn’t. There’s no gray zone.
A Quick Reference: Common Products and Required Listings
The following table shows typical Canadian project listing requirements for common fire protection products. It assumes the project is under NFC 2020 and a provincial building code (OBC in Ontario, BCBC in BC, etc.).
| Produit | Minimum Canadian Requirement | Typical Add-On |
|---|---|---|
| Butterfly valve (≥4″) | cULus Listed, UL 1091 + CAN/ULC-S543 | FM 1120 if insurer requires |
| OS&Y gate valve | cULus Listed, CAN/ULC-S544 | FM 1120 if insurer requires |
| Swing check valve | Homologué cULus | FM 1112 if insurer requires |
| Fire pump (horizontal split-case) | cULus Listed, CAN/ULC-S552 | FM 1321 if insurer requires |
| Sprinkler head | cULus Listed, UL 199 | FM 2008 if insurer requires |
| Fire Department Connection (FDC) | Homologué cULus | — |
| Grooved coupling | Homologué cULus | FM 1920 if insurer requires |
The pattern is consistent. cULus is the baseline. FM is an additional credential layered on top when the insurance carrier demands it. ULC-only listings exist for some Canadian-specific product categories, but cULus covers the majority of cross-border fire protection products you’ll specify.
Ontario Building Code and Toronto Practice
Ontario Building Code Division B, Section 3.2.5 governs fire protection systems in Ontario. OBC adopts NFPA 13, NFPA 14, and NFPA 20 by reference, which means the underlying design rules match US practice. The differences appear in the listing requirements and the submittal documentation — exactly where this article has been focused.
Toronto Fire Services, as the local AHJ, reviews submittals against both the NFC (listing requirement) and the OBC (design requirement). In practice, contractors who work regularly in downtown Toronto specify cULus Listed products as a default because it simplifies stock management: the same product works on US and Canadian projects, so the same part number moves through the warehouse either way.
For a broader reference on fire protection supply across Toronto and the GTA, see our fire protection supplier in Toronto page.
Common Misunderstandings
A few recurring misunderstandings come up in submittal reviews.
“FM Approved is the highest level, so it should cover everything.” No. FM Approved is a different program, not a superset. An FM Approved product without cULus Listing is still not acceptable in Canada. FM and UL/ULC test for overlapping but distinct things.
“ULC is just Canada’s version of UL — they’re identical.” Not quite. ULC standards are derived from the same engineering base as UL, but they incorporate Canadian code structure, materials common in Canadian construction, and climate considerations. The cULus program harmonizes the two, which is why it’s preferred.
“We can grandfather the existing UL-only valves on a retrofit.” You can generally keep the existing installation in service (grandfathering), but any replacement or new addition must meet the current code — meaning the replacement valve must be cULus Listed, even if the valve next to it was installed 20 years ago under an older code.
“The manufacturer’s catalog shows the UL logo — that’s enough.” The catalog shows what the manufacturer claims. The listing card shows what the certification body has verified. Always require the listing card.
Foire aux questions
Is a UL Listed valve acceptable in a Canadian project? Generally no. The National Fire Code of Canada requires a listing from an SCC-accredited certification body. A UL-only listing does not satisfy that requirement. Use a cULus Listed or ULC Listed product instead.
Is FM Approval enough on its own? No. FM Approval is a separate program that addresses loss prevention performance. It does not substitute for UL or ULC Listing. Canadian projects still require a cULus or ULC Listing in addition to any FM Approval the insurer may demand.
What does the cULus mark mean? It means the product has been evaluated against both the relevant UL standard (for the United States) and the relevant CAN/ULC standard (for Canada) under a single UL certification program. The “c” on the left represents Canada, the “us” on the right represents the United States. It’s acceptable in both countries.
Are Intertek ETL-C and CSA listings acceptable in Canada? Yes, provided the specific product category falls within their SCC accreditation scope. For fire protection products, cULus and ULC are the most common and most broadly applicable listings, but Intertek ETL-C and CSA are valid alternatives where they apply.
Do I have to replace UL-only valves on a retrofit project? No, the existing installation is typically grandfathered under the code in force when it was built. However, any new valve added or any valve being replaced as part of the retrofit must comply with the current code — meaning new components must be cULus Listed.
Where do I find a product’s listing card? For UL and cULus Listings, search the UL Product iQ database at ulsolutions.com. For ULC Listings, use the same database filtered to CAN/ULC standards. Request a copy from the manufacturer as part of submittal package.
Next Steps
Three takeaways summarize the entire Canadian approval landscape. First, cULus or ULC Listing is the minimum for fire protection products in Canadian projects — UL alone is not enough. Second, specify the listing explicitly in the project documents, including the standard number and the requirement to provide the listing card. Third, treat FM Approval as an additional credential for insurance purposes, not a replacement for the base listing.
If you’re sourcing cULus Listed fire protection products — butterfly valves, OS&Y gate valves, fire pumps, sprinkler components, grooved fittings — for a Toronto or Canadian project, explore the ValveAtlas fire protection catalog ou contact our technical team for submittal-ready listing documentation. We supply products with the correct Canadian listings in stock so your submittal package is complete on the first pass.
