| CSI Code | Short Description | Extended Description |
| 11200 | Water Supply and Treatment Equipment |
| 11210 | Supply and Treaatment Pump |
| 11220 | Mixers and Flocculator |
| 11225 | Clarifier |
| 11230 | Water Aeration Equipment |
| 11240 | Chemical Feed Equipment | Coagulant Feed Equipment |
| 11250 | Water Softening Equipment | Base - Exchange or Zeolite Equipment Lime - Soda Process Equipment |
| 11260 | Disinfectant Feed Equipment | Chlorination Equipment Hydrogen Power (pH) Equipment |
| 11270 | Fluoridation Equipment |