- 22.00.00: Plumbing
- 23.00.00: Heating, Ventilating, and Air Conditioning (HVAC)
- 40.00.00: Process Interconnections
As one of the nation's largest building systems experts, Southland Industries provides innovative, practical results for your engineering, construction, service, and energy needs. Optimizing each stage of the building lifecycle with our in-house expertise, we connect to your business strategy by delivering holistic solutions.