List of Specific Industries
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North American Industry Classification System (NAICS) codes for this industry
[ 238220 ] = Plumbing, Heating, and Air-Conditioning Contractors – Drain waste and vent system installation
A residential drain waste and vent (DWV) system is all of the pipes that carry waste out of the home along with other pipes that vent the system to the atmosphere and ensure that everything drains correctly. Home network systems may be able to monitor methane, oxygen, and other gas sensors to verify correct functioning of the DWV system.