Plumbing runs on one of the most structured paths in the trades: apprentice, accumulate hours, test, get licensed. Here's the whole road.
Step 1 — Meet the Entry Bar
- High school diploma or GED. Standard for registered programs.
- Age 18+ for most programs.
- Algebra — many programs require it, some specifically algebra II for pipe-sizing calculations.
- Physical readiness. Kneeling, crawlspaces, lifting are part of the daily job from apprentice year one.
Step 2 — Pick Your Apprenticeship Route
BLS puts the standard apprenticeship at 4–5 years, combining roughly 8,000–10,000 on-the-job training hours with concurrent classroom instruction. Two main sponsor routes:
| Route | Who Runs It | Character |
|---|---|---|
| Union | United Association (UA) | Negotiated wage scale, structured JATC training, strong commercial/industrial exposure |
| Non-union | PHCC, ABC chapters | Contractor-employed, registered apprenticeship, widely available |
Apprentice pay typically starts around 40–50% of journeyman scale and rises to near-journeyman by completion — some states allow documented experience to substitute for part of the formal apprenticeship if you're coming from adjacent work.
Step 3 — Apply
Expect an application, an aptitude assessment (math and reading), and an interview. Strong union locals can be competitive; PHCC/ABC programs are generally more directly accessible. Apply to more than one simultaneously.
Step 4 — The Apprenticeship Years
Full-time field work under journeymen, plus concurrent classroom instruction on code and theory. You'll learn rough-in, fixture setting, drain-waste-vent systems, water supply, and — depending on your sponsor — gas piping and beyond. Pay steps up on a published schedule as you accumulate hours.
Exact hour thresholds vary by state. Texas requires 8,000 hours plus a 48-hour approved training course; Michigan requires 6,000 hours over at least 3 years; Iowa requires a full 4-year DOL-registered apprenticeship. "8,000–10,000 hours" is the general BLS range — your state board's number is the one that counts. Full detail: state-by-state licensing guide.
Step 5 — Test for Your Journeyman License
Licensing is administered at the state level in most cases (a few states delegate to municipalities). The exam is based on whichever plumbing code your state has adopted — the Uniform Plumbing Code (UPC) in most western states, the International Plumbing Code (IPC) in most eastern and central states (the difference explained). Typical costs run in the range of $35–$100 for exam fees and licensing, varying significantly by state.
Step 6 — Journeyman and Beyond
As a journeyman you work independently — median plumber pay is $62,970 (BLS, May 2024), with top states well above that. After roughly 2 additional years as a journeyman, you can test for master plumber, unlocking permit authority, supervision, and contracting eligibility. Full ladder: apprentice to master.