On 6 February 2026 the Canadian International Trade Tribunal (CITT) found that dumped and subsidized imports of cast iron soil pipe from China have caused material injury to the Canadian domestic industry, triggering collection of definitive duties by the Canada Border Services Agency (CBSA). Final anti-dumping duties range from 155.5% to 444.2% of export price by exporter (444.2% for all other exporters), and a flat countervailing (subsidy) duty of 28.5% of export price (equivalent to CNY 1,550.44 per metric tonne) applies to all Chinese exporters. CBSA had initiated the dumping and subsidizing investigation on 11 July 2025 following a complaint from Canada Pipe Company ULC, d.b.a. Bibby-Ste-Croix (Sainte-Croix, Québec), and imposed provisional duties from 9 October 2025 pending the final determination and injury finding.

Analyst notesShow

Mechanism

CBSA initiated a combined dumping and subsidizing investigation into cast iron soil pipe (nominal outside diameter 1.5–18 inches, HS 7303.00.00.10 / 7303.00.00.90) from China on 11 July 2025, responding to a complaint from Canada Pipe Company ULC (Bibby-Ste-Croix), the sole Canadian producer. Provisional duties applied from 9 October 2025 (preliminary margins of 213.4% to 329.2%). CBSA's final determination on 7 January 2026 set definitive per-exporter dumping margins (Dinggin Hardware 155.5%, Global Metal & Investment HK 294.2%, Max International Supply 243.1%, Shijiazhuang Sunrise International Trading 191.6%, all other exporters 444.2%) plus a flat 28.5% subsidy margin for all Chinese exporters. The CITT's 6 February 2026 injury finding converted these into definitive duties collected by CBSA on goods released on or after that date; full reasons were issued 23 February 2026.

Severity is anchored on the disclosed duty magnitude: a 444.2% all-other- exporters anti-dumping rate is among the highest in the register, functionally a prohibitive tariff on Chinese cast iron soil pipe, plus a uniform 28.5% countervailing duty.

Downstream implications

Chinese cast iron soil pipe is effectively priced out of the Canadian market;

Bibby-Ste-Croix (the sole domestic producer) is the direct beneficiary.

Sets a further precedent for CBSA/CITT stacking near-prohibitive AD margins

with a flat CVD rate on Chinese building-materials exporters, consistent with the pattern seen in the CITT's June 2026 thermoformed molded fibre tableware finding (NQ-2025-008).

Importers of record face retroactive-style duty exposure back to the 9

October 2025 provisional-duty date for goods entered during the investigation period.

Open questions

Whether any of the five named exporters (or new exporters) seek an expiry

review or normal-value reinvestigation to reduce their individual margins.

Whether alternative sourcing (e.g., non-Chinese cast iron pipe producers)

absorbs displaced Canadian demand or whether prices simply rise.

Sources

Primary: CBSA — Statement of reasons, Final determinations, Cast Iron Soil Pipe (CISP 2025 IN) · CBSA — Notice of final decisions, Cast Iron Soil Pipe (CISP 2025 IN) · CBSA — Cast Iron Soil Pipe: Measures in Force · CITT — Tribunal Finds Injury, Cast Iron Soil Pipe from China

Secondary: GTA state-act record — Canada anti-subsidy duty on cast iron soil pipe from China · GTA intervention record

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Mechanism

Downstream implications

Chinese cast iron soil pipe is effectively priced out of the Canadian market;

Bibby-Ste-Croix (the sole domestic producer) is the direct beneficiary.

Sets a further precedent for CBSA/CITT stacking near-prohibitive AD margins

with a flat CVD rate on Chinese building-materials exporters, consistent with the pattern seen in the CITT's June 2026 thermoformed molded fibre tableware finding (NQ-2025-008).

Importers of record face retroactive-style duty exposure back to the 9

October 2025 provisional-duty date for goods entered during the investigation period.