Free Courses / Plumbing University A-Z

Plumbing University A-Z

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Read me first: This course does NOT make you licensed, insured, or qualified to do paid plumbing work alone. In nearly every U.S. state, contracting plumbing work requires a license, and gas work requires additional qualification — check your state's licensing board for the exact rules where you live. Practice only the safe activities listed — never cut, solder, or repair real piping or appliances without qualified supervision.

Welcome, future tech 👋

This is a free, 12-unit, ~120-hour course that takes you from zero plumbing knowledge to apprenticeship-ready. Every training video is embedded right here — you never have to leave this page. Your progress saves automatically in this browser.

How to use this course

Do the units in order — each one builds on the last. Plan ~10 hours per week (one unit per week).
Watch each video actively: pause at every new term, write a one-line definition in your own words, then resume. Tick “Mark watched” when done.
Read “The big picture” and “Critical points,” do the practice tasks, then take the quiz — answer out loud before revealing.
Download the unit notes (a one-page summary) and keep them in a binder.
When you meet the “Done when” standard, hit Mark unit complete and move on. Unit 2's safety quiz requires 100% — no exceptions.

🃏 Tool Flashcards

The 8 Hard Stops (memorize before Unit 3)

Never touch gas piping or gas appliances. Gas smell = leave the building, call 911/the utility from outside.
Treat ALL wastewater as contaminated — gloves, eye protection, washed hands before eating, every time. A cut exposed to sewage = clean and report immediately.
Never use a torch or open flame — soldering and brazing are trained, supervised skills (fire, burns, fumes).
Never enter a trench, pit, or crawl space alone — collapses and bad air kill fast (OSHA).
Never touch water heater wiring or any electrical connection — water plus electricity kills. And a T&P relief valve is a safety device: never cap, plug, or remove one.
Never cut into a pipe you haven't identified and shut off — unknown lines can be pressurized, scalding hot, gas, or contain asbestos/lead in old buildings.
Never run a drain machine (auger or jetter) without training — they catch gloves and break wrists.
Water above 120°F scalds in seconds. Working in heat: dizziness or cramps = water, rest, shade (OSHA).

About the videos and sources

All 25 videos were verified live (title and channel confirmed via YouTube's own API) on the course's research date, 2026-06-12, with a 5-year recency window. Publish dates come from search-engine metadata; where a date could not be confirmed, the video card says so plainly and asks you to check the on-screen date. Topics with no qualifying current video — trench safety, sewage hygiene, a dedicated DWV animation, tank-heater anatomy — link official OSHA, CDC, DOE, and university sources instead, and say so. Safety, licensing, and career facts are confirmed against OSHA, CDC, DOE, and BLS sources — licensing details vary by state, so the course points you to YOUR state's licensing board rather than naming one state's rules. If a video and an official source ever disagree, the official source wins.