Cast Iron Soil Pipe Investigation

Summary#

The Canada Border Services Agency has opened investigations under the Special Import Measures Act into alleged dumping and subsidizing of cast iron soil pipe from the People’s Republic of China. The move starts a preliminary injury inquiry by the Canadian International Trade Tribunal, and interested parties can send evidence to the agency by November 17, 2025.

What it does#

• Opens anti-dumping and countervailing (subsidy) investigations into cast iron soil pipe said to come from the People’s Republic of China (initiated July 11, 2025).
• Identifies the likely tariff lines involved as 7303.00.00.10 and 7303.00.00.90, but says those codes may include non-subject goods and some subject goods may be classified elsewhere.
• Asks the Canadian International Trade Tribunal to do a preliminary inquiry into whether Canadian producers are being harmed; the Tribunal must decide within 60 days of the start of the investigation.
• Says the CBSA will publish a Statement of Reasons within 15 days after that Tribunal decision.
• Invites written submissions (evidence and arguments) to the CBSA; to be considered, they must arrive by November 17, 2025. Submissions are public unless clearly marked confidential, and confidential filings must include a non‑confidential edited version.

Who's affected#

• Manufacturers and distributors of cast iron soil pipe in Canada (domestic industry).
• Importers, wholesalers, and retailers who bring in or sell cast iron soil pipe that might match the product description or the listed tariff numbers.
• Exporters in the People’s Republic of China who ship this product to Canada.
• Other businesses that use cast iron soil pipe in construction, plumbing, or renovation projects could see supply or price effects depending on the outcome.
• It is unclear from the notice exactly which models, sizes, or specific products are covered; the full product definition is on the CBSA website.

Why it matters#

• If the investigations lead to findings of dumping or subsidizing and to duties, import costs for the affected pipe could rise. That can increase costs for builders, plumbers, and hardware suppliers.
• The inquiry may slow imports while evidence is gathered. Importers should watch the case and consider sending information by November 17, 2025 if they want their views considered.
• The process will determine whether Canadian producers are harmed; its outcome can change sourcing options and prices in the plumbing and construction supply chain.