CAST IRON SOIL  
CAST IRON SOIL  
PIPE SUPPLY (PART 2)
PIPE SUPPLY (PART 2)
IN BUILDERS DIGEST’S  
“Supply of Cast Iron Soil Pipe” 
(CISP) article (quarter 4, 2025), the 
members of the Metropolitan Toronto 
Plumbing and Heating Contractors 
Association (MPHCA) expressed two key 
concerns about the federal government’s 
action regarding dumping of CISP 
imported from China. These concerns 
are that no single supplier becomes the 
sole source for CISP in Canada (there 
is currently only one domestic supplier) 
and that the substantial price disparity 
between domestic and offshore suppliers 
could have long-term consequences for 
contractors and project costs.
The issue of unfair competition concerns 
was raised to the federal government by 
the Canadian Pipe Company, a subsidiary 
of Bibby Ste. Croix (Bibby), a Canadian 
supplier of CISP who alleged injury to the 
domestic industry from unfairly priced 
imports. The initial steps taken in October 
2025 included duties of more than 300 
per cent allocated to imported Chinese 
CISP after review by the Canadian Border 
Services Agency (CBSA) and the Canadian 
FEDERAL AND CONTRACTOR ACTION AND UPDATE
International Trade Tribunal (CITT). Final 
decisions by CBSA and CITT on this claim 
were forecast to be announced in  
early 2026.
Both CBSA and CITT have now made 
their final decisions on the CISP claim by 
Canadian Pipe Company. These decisions 
are based on 2025 investigations and 
meetings held in early 2026. MPHCA has 
expressed to the Canadian government 
that their action on this claim has 
significant implications for pricing, supply 
and competition within their sector. The 
By Warren Heeley
24   Quarter 2  2026   BUILDERSDIGEST 
CAST IRON CONCERN

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