- 11310 - Sewage and Sludge Pumps
- 15100 - Building Services Piping
- 15110 - Valves
- 15130 - Pumps
- 15160 - Storm Drainage Piping
- 15300 - Fire Protection Piping
- 15450 - Potable Water Storage Tanks
- 15500 - Heat Generation
- 15510 - Heating Boilers and Accessories
- 15550 - Breechings, Chimneys, and Stacks
- 15750 - Humidity Control Equipment
- 15950 - Testing, Adjusting, Balancing
- 21 05 23 - General-Duty Valves for Water-Based Fire-Suppression Piping
- 21 11 00 - Facility Fire-Suppression Water-Service Piping
- 21 20 00 - FIRE-EXTINGUISHING SYSTEMS
- 22 05 23 - General-Duty Valves for Plumbing Piping
- 22 11 00 - Facility Water Distribution
- 22 12 00 - Facility Potable-Water Storage Tanks
- 22 13 16 - Sanitary Waste and Vent Piping
- 22 14 00 - Facility Storm Drainage
- 22 14 13 - Facility Storm Drainage Piping
- 22 14 26 - Facility Storm Drains
- 23 05 23 - General-Duty Valves for HVAC Piping
- 23 05 93 - Testing, Adjusting, and Balancing for HVAC
- 23 08 00 - Commissioning of HVAC
- 23 20 00 - HVAC PIPING AND PUMPS
- 23 21 23 - Hydronic Pumps
- 23 50 00 - CENTRAL HEATING EQUIPMENT
- 23 51 00 - Breechings, Chimneys, and Stacks
- 23 51 13 - Draft Control Devices
- 23 51 16 - Fabricated Breechings and Accessories
- 23 51 19 - Fabricated Stacks
- 23 51 23 - Gas Vents
- 23 51 33 - Insulated Sectional Chimneys
- 23 52 00 - Heating Boilers
- 23 52 16 - Condensing Boilers
- 23 52 19 - Pulse Combustion Boilers
- 23 52 23 - Cast-Iron Boilers
- 23 52 33 - Water-Tube Boilers
- 23 52 39 - Fire-Tube Boilers
- 23 84 00 - Humidity Control Equipment
- 23 84 13 - Humidifiers
- 23 84 16 - Dehumidifiers
- 23 84 19 - Indoor Pool and Ice-Rink Dehumidification Units
- 43 21 00 - Liquid Pumps
- 44 42 53 - Water Treatment Oil/Water Separators