| Includes | desalination, softening, and other types of demineralization equipment for water and wastewater treatment. |
| Alternate Terms/Abbreviations | EDR: electrodialysis reversal. RO: reverse osmosis. |
| See | 40 90 00 for process controls, and flow measurement instrumentation. 43 32 00 for industrial water purification equipment such as ion exchange vessels, reverse osmosis, and electronic deionization equipment. |