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Gas Pipe Licensing

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What Is It?

A gas piping mechanic license allows you to install gas piping from the meter to the appliance or to the point of use.

When you get your license, remember that:

  • You must renew your license each year. You can renew and pay for trade licenses online.
  • You have up to one year after your license expires to renew your license. After one year you will need to retake the exam to reinstate your license.
  • You must obtain your license within 90 days of passing the test.

How Much Does It Cost?

For exam and licensing fees, see our fee subtitle.

The Exam

Our exam will test you on general, code, and licensing knowledge related to gas piping. It is an open book, multiple-choice test. You need a score of at least 70 percent to pass the test. You need to bring your own copy of the International Fuel Gas Code and Seattle amendments.

If you need help in your native language to complete the exam, you can bring an interpreter or translation device with you.

Steps to Get Your License

  1. Read the law and learn the requirements for prequalification. You can buy the International Fuel Gas Code and Seattle Amendments at our Public Resource Center
  1. Review the trade license requirements in the code.
  2. Submit an application.
  1. Submit an affidavit with proof that you have:
  • Either 6 months experience as a gas piping mechanic or an unlicensed worker supervised by a gas piping mechanic, or a combination of the two
  • A certificate of completion from a board-approved gas piping mechanic class
  • A valid plumber’s license
  1. Schedule and complete an exam.
  2. Pay for your license.

Recommended Reading

  • Corrugated Stainless Steel Tubing (CSST) listed to the ANSI/AGA Standard LC-1. The design and installation guide of any one of these manufacturers is recommended:
    • Gastite or Titeflex: 603 Hendee Street, Springfield, MA 01139-0054. Phone (800) 662-0208, fax (413) 739-7325
    • Wardflex: Wardflex 732 North Diamond Bar, Suite 212, Diamond Bar, CA 91765, Phone (909) 860-3653, fax (909) 860-2302
  • ASTM B 837 Requirements for Copper Tubing. Contact the Copper Development Association, 260 Madison Avenue, New York, NY 10016. Phone (212) 251-7200, fax (212) 251-7234.

Still Need Help?


 Ask Us

  • Licensing Technician, (206) 684-5174
  • Larry Leet, Licensing Supervisor, (206) 684-8459
  • Fax, (206) 386-4039
  •  
  • Visit Us on the 21st Floor
    700 5th Avenue, Seattle