Mark III’s Mechanical division has the capability to design and deliver all mechanical systems of projects integral to the client’s needs for functionality and production. With process piping, hydronics, HVAC and plumbing all within Mark III’s scope, the client’s design intent can be fully executed and coordinated to achieve maximum efficiency. Every project is guaranteed first-rate workmanship, competitive pricing and the highest product quality installed to exceed expectations. Our craftsmen have years of experience pipe-fitting, assembling duct-work, welding and installing systems to the highest quality. Focusing on top performance and efficient design, Mark III differentiates itself as in industry leader and a valuable project partner.

Our Mechanical Services Include:

  • Process piping
  • HVAC
  • Under-slab utilities
  • Chiller and boiler systems
  • Gas, air, and condensate lines
  • Fire sprinkler systems
  • Commercial kitchens
  • ADA restrooms
  • LEED-compliant plumbing systems
  • Sand/oil separators
  • Trench drains
  • Sewer and storm drain lines
  • Ejection systems
  • Roof drains
  • Design-build capabilities


Mark III has provided plumbing services of all kind for decades. We employ the best plumbers who understand what it takes to provide excellent customer service in the construction industry. We provide water and gas systems, commercial kitchens, core restrooms, and everything in-between for complete plumbing.


Your HVAC system running at its top performance results in energy savings that are important to a client’s bottom line, the environment, and regulatory entities. Mark III provides a level of service focusing on maximum efficiency and saving money through proper sizing of units, preventive maintenance and efficient design.


Process Piping

All central systems and equipment components need to be integrated and talking to one another. The engineering necessary to make sure that all systems firing on all cylinders is the pipe-fitting and process lines that connect them all. Mark III employs pipe-fitters, welders, and process engineers to produce the highest quality process lines for chillers, boilers, stainless food grade systems and more.

Fire Protection

Our qualified project managers, designers, fabricators, installers, and inspectors have extensive expertise working on numerous facilities with varying types of fire protection systems. Mark III offers a range of fire protection systems, including wet and dry sprinkler systems, gaseous and foam suppression systems, hood suppression systems, and much more. As a member of your design team, we can offer performance based and prescriptive design to meet your specific requirements that is safe, reliable, and is entirely compliant with all local and regional code requirements.

Our Fire Protection Services Include:

  • Light, ordinary, and extra hazard systems
  • Wet, dry, and antifreeze system configurations
  • Cold room fire protection
  • In-rack and high-piled storage, including Control Mode Specific Application (CMSA) and Early Suppression Fast Response (ESFR) systems
  • Fire pump installation, inspection, and service
  • Tenant improvements and New Construction projects
  • Performance Based and Prescriptive Design, including 3D design concepts incorporating clash-detection technology
  • System analysis, hazard analysis, due diligence reports, maintenance, and service
  • Sprinkler inspections per NFPA 25 standards as amended by Title 19