North American Product Classification System (NAPCS) Canada 2012 Version 1.0
- 551 - Wholesale services (except commissions)
- 55116 - Building materials and supplies, at wholesale
- 551163 - Plumbing, heating and air-conditioning equipment and supplies, at wholesale
- 5511631 - Plumbing equipment and supplies (including valves), at wholesale
- 5511632 - Heating, ventilation and air-conditioning equipment and supplies, at wholesale
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