Armstrong A4AC6 Service Valve Assembly from Canada
The Armstrong A4AC6 service valve assembly allows refrigerant charging, evacuation, and pressure testing on air conditioning condensing units while maintaining system integrity. Classified under HTS 8415.90.80 as access fittings for temperature/humidity control elements.
Duty Rate — Canada → United States
15%
Rate breakdown
9903.82.1015%Except as provided for in headings 9903.82.12, 9903.82.17 and 9903.85.68, derivative aluminum and steel articles with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 15 percent, as provided for in subdivision (f) of U.S. note 16 to this subchapter
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Schrader vs flare connections require specific torque specs documentation
• Pressure/temperature ratings must match system design pressures (700psi+)
• Cap seals and o-ring materials affect leak rate certifications