Cast Iron Gas Vent Pipe 4-inch
4-inch cast iron pipe for venting natural gas appliances like boilers in commercial settings. HTS 7303.00.00 for this hollow cast iron profile resistant to high temperatures.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | +37.5% | 37.5% |
| 🇲🇽Mexico | Free | +10.0% | 10% |
| 🇨🇦Canada | Free | +10.0% | 10% |
| 🇩🇪Germany | Free | +10.0% | 10% |
| 🇯🇵Japan | Free | +12.5% | 12.5% |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If alloy steel gas tubes
High-temp alloys use 7304.51; plain cast iron stays 7303.
If plastic-coated steel vents
Coated variants shift headings based on predominant material.
If stove-specific parts
Appliance-integrated vents classify with the stove in 7321.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• NFPA 54 compliance docs; specify draft hood connections
• Insulate bundles for cold weather ports to prevent brittleness
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