How to Become a Journeyman Plumber

The Core Requirements

Becoming a journeyman plumber commonly involves registered apprentice status, thousands of hours of supervised field work, and a passing score on the licensing exam. The specifics vary by state, and some jurisdictions offer alternative pathways.

Where a jurisdiction requires apprentice registration, the usual progression is to register, log the required field hours under supervision, complete any classroom requirements, then sit for the exam. Attempting to shortcut required registration or supervision, or relying on a trade school diploma as a substitute for field time, can result in voided hours or application problems.

State-by-State Hour Requirements

The number of supervised hours required for journeyman eligibility varies significantly:

Texas (TSBPE): 8,000 hours of documented apprentice experience, with at least 2,000 hours under a licensed Master Plumber. Plus a mandatory 48-hour board-approved classroom training course. Critical: you must register as a Plumber's Apprentice with the TSBPE before your hours start counting. Any work performed before registration is permanently excluded.

Colorado (DORA): 6,800 hours (minimum 4 years) of practical experience for the Journeyworker Plumber license. Apprentices must register with the State Plumbing Board within 30 days of initial employment ($30 registration fee). A completed trade school plumbing program earns 1 year of credit (1,700 hours), reducing the field requirement to 5,100 hours.

Illinois (IDPH): 5,600 hours (minimum 4 years, at least 1,400 hours per year) as a licensed apprentice plumber under direct supervision of an Illinois-licensed plumber. Approved trade school coursework provides credit at a 2:1 ratio, up to 24 months (2,800 hours) — potentially halving the field requirement.

Florida (DBPR contractor framework): The research identifies 4 years of field experience, with at least 1 year in a supervisory role, for state contractor certification. Florida uses a "Certified" (statewide) vs. "Registered" (local jurisdiction) licensing model. Up to 3 years of the experience requirement can be substituted with approved college coursework or military service.

New York City (DOB): 7 years of total experience within the past 10 years under a licensed Master Plumber, with at least 2 years as a registered NYC journeyman. A Bachelor's in mechanical engineering reduces this to 5 years. NYC is an outlier — most states are in the 4,000–8,000 hour range.

Step 1: Register as an Apprentice

This is the step most people skip or delay, and it's the one that costs the most when done wrong.

In Texas, the TSBPE explicitly states that hours worked before your apprentice registration is officially approved don't count. Period. If you've been working for a plumbing company for two years as a "helper" without registering, those 4,000+ hours are gone. You start your clock at zero on the day your registration is approved.

The registration process varies by state:

• Texas: $15 fee, plus mandatory fingerprinting through IdentoGO ($39.05, Service Code 11J66Z)
• Colorado: $30 fee, must be filed within 30 days of starting plumbing work
• Illinois: $50 fee, must be sponsored by a licensed plumber or approved program

In states with registration requirements, do this on day one — before your first shift. Not next week, not after your first paycheck. Day one.

Step 2: Log Your Hours

Once registered, every hour of supervised plumbing work counts toward your exam eligibility. The key word is "supervised" — most states require that your work be performed under the direct oversight of a licensed plumber (journeyman or master, depending on the state).

What counts: Installation, maintenance, and repair of plumbing systems. Pipe fitting, fixture installation, drain and sewer work, water heater installation, gas piping. Work performed on both residential and commercial projects.

What doesn't count in most states: General labor (digging trenches, hauling materials), work performed without a licensed supervisor on site, work performed for an unlicensed contractor, and hours logged before your apprentice registration was approved.

Documentation matters. Keep a daily log of hours worked, categorized by task type. Have your supervising plumber sign off weekly or monthly. State boards can and do audit experience claims, and documentation requirements vary by jurisdiction.

Step 3: Complete Classroom Requirements

Most states require some form of Related Technical Instruction alongside field work:

• Texas: 48-hour board-approved training course for Journeyman (covers OSHA, code training, and related technical subjects)
• Colorado: Trade school graduates get 1 year of credit; the classroom requirement is embedded in the apprenticeship program
• Illinois: Approved trade school programs provide classroom credit at a 2:1 ratio, up to 24 months

If you're in a registered apprenticeship program (union or non-union), the classroom instruction is built into the program curriculum — typically held evenings or weekends. The program handles the scheduling and documentation.

If you're working independently for an employer (not in a formal program), you're responsible for finding and enrolling in approved classroom training separately. Check your state board's website for a list of approved providers before paying tuition — not all trade schools are board-approved, and unapproved courses don't count.

Step 4: Pass the Licensing Exam

Once you've met the hour and classroom requirements, you sit for the journeyman plumbing exam. The format varies by state:

Texas (Pearson VUE): Computer-based, multiple-choice exam. $36 exam fee. Results valid for 1 year from application approval date. The exam covers the International Plumbing Code and Texas state plumbing laws.

Illinois (IDPH): Written code test plus a mandatory physical plumbing assembly project. The $175 application fee includes the exam. You must pass before your 6-year apprentice registration window expires — if you don't, you lose apprentice eligibility entirely.

Colorado (PSI Services): Computer-based, closed-book, multiple-choice. Covers the International Plumbing Code and Colorado state amendments.

Florida (PTI/Pearson VUE): Open-book written exam plus a morning practical that requires five isometric drawings. $135 PTI fee. Scores remain valid for 4 years. Florida also requires a FICO score of 660+ for the certified contractor license.

Study for the specific code your state uses (IPC vs. UPC) and for state-specific amendments. Generic "plumbing exam prep" courses may not cover local variations.

The Faster Path: Tiered Licensing

Some states offer intermediate licenses that let you start working independently sooner:

Texas Tradesman Plumber-Limited: Requires only 4,000 hours (about 2 years) instead of 8,000. Restricts you to one- and two-family dwellings, but gets you earning at a higher rate while you continue building toward full journeyman. Requires a 24-hour board-approved training course and a separate Tradesman exam.

This tiered approach lets you hit an income milestone at the halfway point instead of waiting the full 4 years. If Texas is your state, it's worth targeting the Tradesman exam at the 4,000-hour mark while continuing to accumulate hours toward Journeyman.

Choosing Your Training Path

You don't need trade school to become a journeyman plumber. The vast majority of state plumbing boards require documented field hours and exam passage — not a diploma. You can register as an apprentice, find employment with a licensed plumber, and work your way to the exam through field experience alone.

Trade school becomes valuable when your state offers experience credit for approved programs (Colorado's 1-year credit, Illinois's 2:1 classroom ratio) or when you want to complete classroom requirements on an accelerated schedule before entering the field.

The financial trade-off is significant: apprentices earn $18–$25/hour from day one while building toward their license. Trade school students pay $3,000–$15,000 in tuition and earn nothing during classroom hours. Over a 4-year training cycle, the cumulative financial gap can exceed $100,000.

The Trade School vs Apprenticeship Decision Guide includes plumbing-specific verification tools to confirm which hours count toward your license before you commit to either path.