- 02530 - Sanitary Sewerage
- 02540 - Septic Tank Systems
- 02600 - Drainage and Containment
- 11 48 00 - Cleaning and Disposal Equipment
- 11 57 00 - Vocational Shop Equipment
- 11200 - Water Supply and Treatment Equipment
- 11250 - Water Softening Equipment
- 11260 - Disinfectant Feed Equipment
- 11300 - Fluid Waste Treatment & Disposal
- 11310 - Sewage and Sludge Pumps
- 11330 - Screening and Grinding Equipment
- 11345 - Chemical Equipment
- 11390 - Package Sewage Treatment Plants
- 11440 - Cleaning and Disposal Equipment
- 11500 - Industrial and Process Equipment
- 15470 - Domestic Water Filtrating Equipment
- 15520 - Feedwater Equipment
- 22 32 00 - Domestic Water Filtration Equipment
- 23 53 00 - Heating Boiler Feedwater Equipment
- 23 53 13 - Boiler Feedwater Pumps
- 23 53 16 - Deaerators
- 33 30 00 - SANITARY SEWERAGE UTILITIES
- 33 31 00 - Sanitary Utility Sewerage Piping
- 33 32 13 - Packaged Utility Lift Stations
- 33 32 16 - Packaged Utility Wastewater Pumping Stations
- 33 32 19 - Public Utility Wastewater Pumping Stations
- 33 34 00 - Sanitary Utility Sewerage Force Mains
- 33 36 00 - Utility Septic Tanks
- 33 36 33 - Utility Drainage Field
- 33 39 13 - Sanitary Utility Sewerage Manholes, Frames, and Covers
- 33 39 23 - Sanitary Utility Sewerage Cleanouts
- 33 40 00 - STORM DRAINAGE UTILITIES
- 41 00 00 - MATERIAL PROCESSING AND HANDLING EQUIPMENT
- 42 00 00 - PROCESS HEATING, COOLING, AND DRYING EQUIPMENT
- 43 00 00 - PROCESS GAS AND LIQUID HANDLING, PURIFICATION, AND STORAGE EQUIPMENT
- 43 21 00 - Liquid Pumps
- 44 40 00 - WATER TREATMENT EQUIPMENT
- 44 41 13 - Packaged Water Treatment Plants
- 44 42 00 - General Water Treatment Equipment
- 44 42 53 - Water Treatment Oil/Water Separators
- 44 44 00 - Water Treatment Chemical Systems Equipment
- 44 44 13 - Water Treatment Chemical Feed Equipment
- 44 44 16 - Water Chlorinators
- 44 44 59 - Water pH Adjustment Equipment
- 45 00 00 - INDUSTRY-SPECIFIC MANUFACTURING EQUIPMENT