True or False: In Washington, a plumber holding only the base Journeyman Plumber certification is automatically also certified to install medical gas piping systems, with no additional endorsement required.
Not quite. The answer is B: False
Medical gas installation requires journey-level status plus completion of at least 32 hours of training in an L&I-approved medical gas course; the base journeyman certificate alone does not carry that authorization. L&I issues the medical gas piping installer (MG01) as a separate credential because of the added risk of that work.
Reference: WA L&I L&I Plumber Certification page — Medical gas piping installer (MG01) (Medical gas endorsement prerequisites)
Checked against the official text
Trade Code Wizard is not affiliated with, endorsed by, or licensed by the International Code Council (ICC), the National Fire Protection Association (NFPA), IAPMO, the ESCO Institute, NATE, HVAC Excellence, NASCLA, NICET, the U.S. Environmental Protection Agency, PSI, Prov, Pearson VUE, or any state or local licensing board. Exam and code names are used only to identify which examination this study material prepares you for.
These are original practice questions written to publicly published exam content outlines. They are not actual exam questions, and they do not reproduce code text. Explanations cite code sections and state requirements in our own words — always verify against the code edition your jurisdiction has adopted, which may differ from the edition cited here.
Passing is not guaranteed. This is study material, not a substitute for the adopted code, for your licensing board's requirements, or for qualified instruction.