Connecticut Limited Direct Exchange Geothermal Driller (W-10) License

The Limited Direct Exchange Geothermal Driller (W-10) License allows you to construct:

  • Geothermal bore hole
  • Geothermal system
  • Manifold connection
  • Limited to:
    • Geothermal bore holes employing direct exchange or direct expansion technology
  • Not limited to:
    • Drilling associated with the installation of copper
    • Piping containing a direct exchange heat transfer medium
    • Maintenance, repair, and installation of:
      • Casing
      • Piping
      • Heat transfer media

The registrant must be employed by a registered contractor to perform this work.

How to Get the Limited Direct Exchange Geothermal Driller (W-10) License in Connecticut?

  1. Visit the CT Department of Consumer Protection (DCP) website to read the eligibility criteria, prerequisites, and documentation requirements for obtaining a Limited Direct Exchange Geothermal Driller (W-10) License. Follow the process held in the DCP Well Drilling Informational Page
  2. Meet the necessary education requirements requested by the DCP
  3. Apply online, by visiting the State of Connecticut's eLicense website or send by mail the Occupational Trade Well Driller Application to the DCP official email address This email address is being protected from spambots. You need JavaScript enabled to view it. with the following documents:
    • Criminal Conviction Worksheet, when requested
    • Original certificate of completion of the trainee program issued by the DCP
    • Receipt for payment of the non-refundable application fee by check and/or money order to the "Treasurer, State of Connecticut"
    • For military service experience and training related to this application, contact the CT Department of Labor at (860) 263-6128 to request a recommendation
    • When applying for equivalent experience and training, include all documentation that demonstrates experience and training for the license type designated
  4. Schedule the Limited Direct Exchange Geothermal Driller (W-10) administered by PSI© in the desired location and time and pay the examination fee after receiving the DCP examination approval (the exam must be taken within one year from the date of approval):
  5. Await the official Limited Direct Exchange Geothermal Driller (W-10) License issued by the Department of Consumer Protection

Connecticut Limited Direct Exchange Geothermal Driller (W-10) License Exam Prep Course

Connecticut Limited Direct Exchange Geothermal Driller (W-10) License Exam

Below is all the information related to the trade exam, including the official reference list.

Connecticut Limited Direct Exchange Geothermal Driller (W-10) Trade Exam

  • Testing Method: Computer-based testing; open book
  • Testing Company: PSI©
  • Number of Questions: 40
  • Types of Questions: Multiple choice
  • Time Allowed: 90 Minutes
  • Minimum Passing Score: 70%
  • Subjects Involved (No. of Questions):
    • General Regulations (5)
    • Drilling and Boreholes (5)
    • Drilling Methods (6)
    • Casing (4)
    • Grouting and Sealing (4)
    • Contamination Prevention (3)
    • Safety (1)
    • General Knowledge (9)
    • Abandonment (1)
    • Piping Methods (2)
  • PSI© Limited Direct Exchange Geothermal Driller (W-10) Official Content Outline

Connecticut Limited Direct Exchange Geothermal Driller (W-10) Book Set

This set of books includes all required references for the Limited Direct Exchange Geothermal Driller (W-10) exam. Orders placed before 2 PM are shipped the same day via UPS and a tracking number is emailed before 3 PM.

  • CONNECTICUT LIMITED DIRECT EXCHANGE GEOTHERMAL DRILLER (W-10) - BOOK SET WITHOUT TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $488.48
  • CONNECTICUT LIMITED DIRECT EXCHANGE GEOTHERMAL DRILLER (W-10) - BOOK SET WITH TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $568.48

Connecticut Limited Direct Exchange Geothermal Driller (W-10) Exam Books

Books Allowed in Testing