We offer a wide range of commercial plumbing services. Our plumbers have a broad experience in many facilities, including biological and chemical research laboratories, medical centers, universities, retail, and hi-rise condos.

“We can depend on Harold Brothers Mechanical from start to finish. They are always a team player and have earned the reputation as a premier subcontractor from performance, safety and quality with Callahan Construction.”

Patrick Callahan, President – Callahan Construction Managers
  • Basic commercial plumbing
  • Lab Waste Treatment Systems
  • RODI systems
  • Medical Gases
  • Lab Gases
  • Lok-Ring
  • Pipe Freezing
  • Drain Cleaning
  • Backflow Services
  • Replacements
  • Water Heater Services
  • Start-up And Commissioning Services
  • Post Construction Warranty Service
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