General Contractor Sub-Contractor Manufacturer 220500-Common Work Results for Plumbing 220600-Schedules for Plumbing 220800-Commissioning of Plumbing 230600-Schedules for HVAC 220000-Plumbing 230000-Heating Ventilating and Air Conditioning (HVAC) 260000-Electrical 260500-Common Work Results for Electrical 230100-Operation and Maintenance of HVAC Systems 230500-Common Work Results for HVAC 220100-Operation and Maintenance of Plumbing