North American Product Classification System (NAPCS) Canada 2022 Version 1.0
- 623 - Civil engineering works
- 62351 - Waterworks engineering works
- 623511 - Water filtration plants and pumping stations
- 6235112 - Water towers and pumping stations
- 6235113 - Water filtration and treatment plants
- 623512 - Water supply engineering works
- 6235121 - Water supply engineering works
- Date modified: