Parts
Central heating boilers (other than those of heading 8402) and parts thereof: > Parts
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(r) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(s)
Products classified under HTS 8403.90.00.00
Central Boiler Manifold Header
Forged steel header manifold distributing hot water from central heating boilers to heating zones. Threaded ports specific to boiler sections. HTS 8403.90.00.00 part.
Boiler Low Water Cutoff Switch
Electronic low water cutoff probe switch that shuts down boiler burner when water level drops dangerously low. Specific to central heating boilers. 8403.90.00.00.
Cast Steel Boiler Grate Bars
Replaceable cast steel bars forming the grate in solid fuel central heating boilers for supporting combustion bed. Specific alloy for high heat. HTS 8403.90.00.00.
Boiler Draft Inducer Blower Housing
Aluminum housing for the induced draft fan in gas-fired central heating boilers, promoting proper venting. OEM-specific mounting. Under 8403.90.00.00.
Cast Iron Boiler Heat Exchanger
A cast iron heat exchanger designed specifically as a replacement part for central heating boilers not of heading 8402. It facilitates the transfer of heat from combustion gases to water in the boiler system. Classified under HTS 8403.90.00.00 as a dedicated part of central heating boilers.
Stainless Steel Boiler Burner Assembly
Stainless steel burner assembly tailored for central heating boilers, controlling fuel combustion. It includes nozzle and ignition components integral to boiler operation. Falls under HTS 8403.90.00.00 as parts thereof.
Boiler Control Thermostat Module
Electronic thermostat module for regulating temperature in central heating boilers. Designed exclusively for integration into boiler control systems. Classified in HTS 8403.90.00.00 as a boiler part.
Central Boiler Flue Gas Vent Pipe
Specialized stainless steel vent pipe for exhausting combustion gases from central heating boilers. Engineered for direct attachment to boiler exhaust manifold. HTS 8403.90.00.00 applies as boiler parts.
Boiler Pressure Relief Valve
Safety pressure relief valve assembly for central heating boilers, releasing excess pressure to prevent explosions. Boiler-specific mounting and calibration. Under HTS 8403.90.00.00 as parts.
Steel Boiler Firebox Door
Heavy-duty steel door for accessing the firebox in solid fuel central heating boilers. Includes hinges and seals specific to boiler design. Classified HTS 8403.90.00.00.
Boiler Circulator Pump Housing
Cast iron housing for the circulator pump in hydronic central heating boiler systems. Designed for water circulation within the boiler loop. HTS 8403.90.00.00 part.
Central Boiler Expansion Tank
Pressurized diaphragm expansion tank for absorbing water volume changes in central heating boiler systems. Boiler-integrated mounting brackets. Under 8403.90.00.00.
Boiler Aquastat Control Sensor
Aquastat sensor probe for monitoring water temperature in central heating boilers, controlling burner operation. Specific immersion length for boilers. HTS 8403.90.00.00.
Stainless Boiler Feedwater Valve
Automatic stainless steel valve for maintaining water levels in central heating boilers. Includes float mechanism specific to boiler pots. Part of HTS 8403.90.00.00.
Boiler Sight Glass Assembly
Glass tube assembly with brass fittings for visually monitoring water levels in central heating boilers. Boiler-specific pressure rating. Classified under 8403.90.00.00.