How Many Hours Do You Need for a Plumbing License?

Thinking about becoming a licensed plumber but unsure where to start? You’re not alone. One of the most common—and critical—questions aspiring plumbers ask is: “How many hours do you need for a plumbing license?” The answer isn’t one-size-fits-all; it varies by state, experience level, and license type. But don’t worry—we’ve done the research so you don’t have to. In this guide, you’ll get clear, actionable info to help you plan your path to licensure with confidence.

What Is a Plumbing License and Why Does It Matter?

A plumbing license is an official certification that proves you’ve met your state’s education, training, and examination requirements to legally perform plumbing work. It’s not just a piece of paper—it’s your ticket to credibility, higher earnings, and career advancement.

According to the U.S. Bureau of Labor Statistics, licensed plumbers earn a median annual wage of $60,090 (as of 2024), with top earners making over $100,000. More importantly, most states prohibit unlicensed individuals from performing plumbing work beyond basic homeowner repairs. Getting licensed isn’t optional—it’s essential.

How Many Hours Do You Need for a Plumbing License? (State-by-State Breakdown)

The number of required hours depends entirely on your location. While there’s no federal plumbing license in the U.S., all 50 states (and many municipalities) regulate plumbing through licensing boards. Most require a combination of apprenticeship hours and classroom instruction.

Here’s a snapshot of common requirements:

💡 Note: “Experience hours” typically mean on-the-job training under a licensed plumber—not just any handyman work.

For the most accurate and up-to-date info, always check your state’s plumbing licensing board. Requirements can change yearly, and some cities (like Chicago or New York City) have additional local rules.

What Counts as “Qualifying Hours”?

Not all time spent turning wrenches qualifies. Licensing boards are strict about what counts toward your required hours:

✅ Qualifying Activities:

• Installing, repairing, or maintaining water supply, drainage, or gas piping systems
• Reading blueprints and interpreting plumbing codes
• Working under the direct supervision of a licensed master plumber

❌ Non-Qualifying Activities:

• General construction labor (e.g., digging trenches without pipe work)
• HVAC or electrical work (unless part of an integrated plumbing system)
• Self-employed work without proper supervision or documentation

Most states require your supervising plumber to verify your hours with signed affidavits or logbooks. Keep detailed records—your future license depends on it.

Step-by-Step: How to Earn Your Plumbing License

Ready to get started? Follow these proven steps:

1. Meet Basic Eligibility Requirements

• Be at least 18 years old
• Have a high school diploma or GED
• Pass a background check (required in most states)

2. Enroll in an Apprenticeship Program

Most plumbers start with a 4- to 5-year apprenticeship that combines paid on-the-job training with classroom learning. Programs are often sponsored by:

• Unions (e.g., UA Plumbers & Pipefitters)
• Trade schools
• Private plumbing contractors

📌 Pro Tip: The U.S. Department of Labor’s Apprenticeship.gov lists registered programs near you.

3. Track and Document Your Hours

Use a digital log or official state form to record:

• Dates worked
• Tasks performed
• Supervisor’s name and license number

Many states audit applications—incomplete logs = automatic rejection.

4. Complete Required Classroom Training

Typical coursework includes:

• Plumbing codes (IPC or UPC)
• Safety protocols
• Math for pipefitting
• Blueprint reading

Most states require 200–600 hours of this instruction.

5. Pass the Licensing Exam

Exams usually cover:

• Local and national plumbing codes
• System design
• Math calculations
• Safety regulations

Study guides and practice tests are available through your state board or organizations like PSI Exams or ICC.

6. Apply for Your License

Submit:

• Proof of hours
• Training certificates
• Exam results
• Application fee ($50–$300, depending on state)

Once approved, you’ll receive your journeyman plumber license—the first major milestone in your career.

Journeyman vs. Master Plumber: Hour Requirements Compared

After becoming a journeyman, many plumbers aim for master plumber status. This advanced license allows you to:

• Pull permits
• Start your own plumbing business
• Supervise apprentices

But it requires more experience:

For example, in Massachusetts, you need 150 working days per year for 3 years after your journeyman license before applying for master status.

Common Mistakes to Avoid

Even skilled plumbers get tripped up by these pitfalls:

• Assuming hours transfer between states: Most states don’t accept out-of-state hours without review.
• Skipping classroom training: Some states (like Oregon) require it—even if you have 10,000 field hours.
• Using vague job descriptions: “Helped on plumbing jobs” won’t cut it. Be specific: “Installed 30+ residential DWV systems under supervision.”
• Missing deadlines: Some states require you to apply within 1 year of completing your hours.

When in doubt, contact your state licensing board directly. A 10-minute phone call can save months of delays.

FAQ Section

Q1: Can I get a plumbing license without an apprenticeship?

A: In most states, no. Apprenticeships (or equivalent supervised experience) are mandatory. A few states like Texas allow you to substitute military plumbing experience or trade school credits—but you’ll still need documented hours.

Q2: How long does it take to get enough hours for a plumbing license?

A: Typically 4 to 5 years of full-time work (about 2,000 hours per year). Part-time work will extend this timeline.

Q3: Do online courses count toward plumbing license hours?

A: Classroom hours, yes—many states accept accredited online plumbing courses for the academic portion. But field hours must be in-person and supervised.

Q4: What’s the difference between a certified and licensed plumber?

A: “Certified” often refers to voluntary credentials (e.g., from NCCER), while “licensed” means state-authorized to work legally. Always prioritize licensure.

Q5: Can I work as a plumber while earning my hours?

A: Yes—as an apprentice or plumber’s helper under a licensed professional. You cannot work independently or pull permits until licensed.

Q6: Where can I find my state’s exact plumbing license requirements?

A: Visit your state’s Department of Labor, Professional Licensing Board, or Plumbing Examining Board website. The International Code Council (ICC) also provides code resources, and general background on trade licensing can be found on Wikipedia’s plumbing page .

Conclusion

So, how many hours do you need for a plumbing license? While the exact number varies, most states require 4,000 to 8,000 supervised field hours plus classroom training. It’s a serious commitment—but one that pays off in job security, income, and professional pride.

Whether you’re just starting out or upgrading from journeyman to master, planning ahead and documenting every hour is your best strategy for success.

👉 Found this guide helpful? Share it with a friend who’s dreaming of a plumbing career! And don’t forget to check your state’s official requirements before you apply. Your future as a licensed plumber starts today.