Within the U.S., there are variations on what’s needed to obtain a plumber license. This includes differences in cost and who issues the license in each state.
Whether you are a plumbing business owner who works with apprentices or are a plumber in training, it’s important to understand the licensing requirements in your state or region!
Some states allow transferring a license from specific other states, this is called reciprocity. Others require licensed plumbers from other states to start fresh and apply for a unique license for that state.
This complete guide will provide:
- An overview of every U.S. state’s requirements for quick reference
- A link to each state’s issuing body for a plumber license
- Notice of testing requirements to receive a plumber license
- Any costs required when applying in each state
Plumber License Requirements by State
*For the states without a statewide plumbing licensing, you’ll still need a license. The issuer would be a regional or local office within the state where you intend to operate.
Also, if you’re looking to fill out your team with licensed plumbers, download our FREE Plumbing Hiring Guide for all of the best recruiting tips!
What To Expect in a Plumber License Exam
Plumber license exams typically cover a range of topics to assess candidates’ knowledge and competency in plumbing-related tasks. Topics covered may include:
- Plumbing codes and regulations
- Plumbing systems and components
- Pipe installation and repair
- Blueprint reading
- Water heaters and plumbing fixtures
- Backflow prevention
- Gas piping and venting
- Drainage systems
- Plumbing tools and equipment
- Safety and OSHA regulations
Below are some sample questions you might encounter in a plumber license exam:
- Question: Provide examples of essential plumbing tools and explain how each tool is used in various plumbing tasks.
- Question: Why is backflow prevention important in plumbing systems, and what are the common methods used to prevent backflow?
- Question: Outline the safety measures and regulations associated with installing gas piping and venting systems in residential and commercial buildings.
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Plumber License Wrap Up
Now, you know the requirements for every state’s licensing requirements. Refer back as we update this frequently. After reading this guide you have a better handle on:
- Where to find your state’s website
- Each state’s requirements
- Testing requirements and associated costs
- Sample topics and questions found on plumbing exams