What is Trade Code Wizard?

Trade Code Wizard is an AI-powered building code assistant that gives tradespeople instant, jurisdiction-aware answers for plumbing (IPC, UPC), electrical (NEC), and HVAC work, plus built-in calculators for pipe sizing, vent sizing, conduit fill, and fixture units.

Which codes and trades does it cover?

It covers plumbing (International Plumbing Code and Uniform Plumbing Code), electrical (National Electrical Code / NFPA 70), and HVAC/mechanical code, with answers tailored for plumbers, electricians, and HVAC technicians.

Is Trade Code Wizard a subscription?

Yes. Trade Code Wizard is a subscription service with a free trial for new users. Sign up at tradecodewizard.com to get started.

What calculators are included?

Built-in calculators include pipe sizing, gas pipe sizing, pipe offset, vent sizing, conduit fill, voltage drop, and service/load calculations, alongside reference tables for wire sizing, fixture units, occupancy loads, egress, and energy code.

Can I use it in the field on my phone?

Yes. Trade Code Wizard is a web app that works on phones, tablets, and desktops, so you can look up code requirements and run calculations right on the jobsite.

Who builds Trade Code Wizard?

Trade Code Wizard is built by Pine Digital Designs, a software studio based in Tacoma, Washington.

An opening in a wall or parapet that allows water to drain off a roof as overflow, without a piped connection to the storm drainage system

What is a "scupper"? | Washington Journeyman Plumber Practice Question

What is a "scupper"?

Roof drains and storm drainage piping are sized based on which two factors?
What is the purpose of a secondary (overflow) roof drainage system on a roof with a parapet wall?
True or False: Under the UPC, storm water from a roof may be discharged into the building's sanitary drainage piping, provided that piping…
A building subdrain collecting storm and ground water sits below the level of the public sewer, so it cannot drain by gravity. What does…

Take the full free Washington Journeyman Plumber practice test

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.

What is a "scupper"?

Take the full free Washington Journeyman Plumber practice test

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.

Washington Journeyman Plumber practice question

Washington Journeyman Plumber practice question

Washington Journeyman Plumber practice question

More Washington Journeyman Plumber practice questions

Washington Journeyman Plumber practice question

More Washington Journeyman Plumber practice questions