Dorvin D. Leis Co., Inc.
Dorvin D. Leis Co., Inc.

Hawaii's Premier Mechanical Contractor Since 1967

Our Services

Pipe Trades

DDL has cultivated a skilled team of tradesmen whom take great pride in building any type of mechanical applications; whether the job is plumbing, refrigeration piping, fire sprinkler pipe fitting, medical gas and solar heating.

DDL Offers:

  • Backflow installation and certification
  • Detailing, fabrication and assembly of plumbing & mechanical piping systems and components
  • Time & cost saving installation methods & materials
  • Underground & aboveground fuel oil storage tanks
  • Oil Water Separators & Oil Sand Separators
  • Elevator Sump Pumps, Booster Pumps, Circulating Pumps
  • Plumbing Fixtures including Buy American Act & LEED compliant
  • Domestic Water, Waste,
  • Natural & Propane Gas Piping Installations
  • Refrigeration, Chilled Water, Condenser Water, Condensate Drain Piping
  • Solar Hot Water Systems
  • Gas/Electric Tank Water Heaters, Instantaneous Water Heaters, Boilers
  • HVAC & plumbing expansion tanks
  • Fuel systems including fuel tanks & fuel fill stations
  • Vibration isolation & seismic restraints
  • Generator Exhaust Systems
  • Emergency Eye Wash & Shower Stations
  • Dental & Healthcare Systems
  • Chlorination
  • High pressure sewer jet cleaning
  • DWV pipe camera inspections
  • BIM 3-D modeling

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