Four things moved this week that touch how mechanical and fire protection contractors buy pipe, valves and fittings: a second round of Section 232 inclusions opened in Washington with a very short fuse, Canada’s public consultation on a Türkiye free trade agreement closed, a SIMA administrative review on copper pipe fittings advanced, and Statistics Canada’s Q2 numbers confirmed that input costs are still climbing. Here is what each one means on the ground.
1. Section 232: a second inclusions window closes September 29
The U.S. Department of Commerce published its second inclusions notice in the Federal Register on September 17, giving interested parties until September 29 to file requests to add further derivative products to the Section 232 steel and aluminum tariffs. Accepted requests then go out for a two-week comment period. This follows the first round, which concluded on August 18 with more than 400 additional HTS codes pulled into the existing 50% tariff on steel and aluminum content.
What it means for you: the derivative list is no longer a stable document you check once a year. If you carry U.S.-bound work — or buy through a U.S. distribution point — assume the classification of finished mechanical goods can change inside a single quarter. Two practical steps: first, ask your customs broker to flag any HTS codes in your active purchase orders that appear in the accepted-request list once it publishes in October; second, make sure your suppliers can produce a steel and aluminum content declaration on demand, because the tariff applies to metal content, not to the whole invoice. Contractors who cannot document content end up paying on the full customs value.
2. Canada–Türkiye FTA: consultation closed, negotiations next
Canada’s public consultation on a potential Canada–Türkiye free trade agreement closed on September 14, following the formal launch of negotiations on July 7. Technical teams are now defining scope and preparing for a first negotiating round. Bilateral merchandise trade sat above CA$4.3 billion in 2025, with roughly CA$3.2 billion of that flowing into Canada.
What it means for you: the timing matters more than the headline, because of how Canada’s steel tariff rate quotas are structured. Since December 26, 2025, TRQ volumes have been set at 75% of 2024 import levels for countries with an FTA in force and only 20% for countries without one, with a 50% surtax on anything above quota. Türkiye currently sits in the 20% bucket. Until an agreement is concluded and in force, Turkish-origin steel product lines will keep hitting quota earlier in the year than FTA-origin equivalents — so front-load your ordering for long-lead items rather than assuming Q3 and Q4 availability. We covered the procurement mechanics in more depth in Canada–Türkiye FTA Talks: What They Mean for Steel Pipe and Valve Procurement.
3. Copper pipe fittings: SIMA review reshapes the duty math
The CBSA’s administrative review of anti-dumping and countervailing measures on copper pipe fittings from China, South Korea and the United States is working through its response stage, with importer and exporter submissions filed earlier this summer. The measures have been in place in some form since 2007. Non-cooperative exporters face anti-dumping duties of up to 242%, with countervailing duties applying separately to Chinese-origin goods.
What it means for you: the subject goods are exactly the fittings used in plumbing, heating, air conditioning and refrigeration work — HS 7412.10 and 7412.20. New normal values coming out of this review will reset landed cost on affected lines, and the gap between a cooperative and a non-cooperative exporter is large enough to swamp any unit price difference. When you request quotes on copper fittings, ask specifically whether the exporter has a normal value on file from this review. It is a one-line question that protects the margin on a mechanical rough-in package.
4. Costs: Q2 up 3.5% year over year, steel still firm
Statistics Canada reported non-residential building construction costs up 1.4% in Q2 2026, after 0.9% in Q1, for a 3.5% year-over-year increase. The divisions that matter most to mechanical trades led the move: structural steel framing (+2.2%) and metal fabrications (+2.0%), alongside conveying equipment (+2.9%) and earthwork (+2.2%). Québec (+2.7%) posted the largest regional increase, with Saskatoon and London both at +2.1%.
On the commodity side, North American hot rolled coil has stayed elevated on tight supply and soft import volumes, with mills scheduling more than a million tons of capacity offline this fall and 2027 order books being written at higher levels.
What it means for you: a 3.5% annual escalation on non-residential work is now the baseline assumption, not a risk case. On tenders with delivery beyond two quarters, carry an escalation clause on steel-content items specifically rather than a flat contingency across the package — steel framing and metal fabrications are moving faster than the composite index. Demand-side pressure is not letting up either: data centre and battery energy storage projects continue to pull heavily on fire protection scope across Canada and the U.S., which we looked at in The Data Center Boom and Fire Protection and in our 2026 Canadian construction outlook.
Working through a tariff or lead-time question?
ValveAtlas supplies industrial valves, fire protection and HVAC products to mechanical and fire protection contractors across Canada and the northeastern U.S. If you are sizing a package against a quota deadline or need clarity on origin documentation for an upcoming bid, get in touch.
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