Plumbing School Information
By Crystal Lee
| Last Updated
Plumbing is one of the most attractive sectors of the skilled trades industry thanks to the good pay, varied work, and potential for advancement. Attending a plumbing school can give you the opportunity to develop key skills for this in-demand, practical career field.
Find a Plumbing School
Education & Training
The primary route into this vocation involves an apprenticeship. However, programs at plumbing trade schools can help people like you gain important skills that provide a competitive edge when applying for apprentice positions.
Length of Training
It generally takes between four and 24 months to complete a pre-apprenticeship plumbing program at a vocational school. Plumbing apprenticeships typically last for four or five years in total.* In some cases, trade school program credits can be applied toward an apprenticeship, which shortens it.
Most Common Length of School*
(range in months)
You can take a plumbing program at a trade school or vocational college, complete an apprenticeship, or pursue a combination of those two options.
Certificate or diploma programs: These typically take no more than a year to complete.* They are designed to help students learn basic plumbing concepts and skills.
Associate degree programs: These can last up to two years.* They tend to include the same kinds of courses as certificate or diploma programs but also incorporate more general education courses like math and science.
Apprenticeship programs: Most plumbers learn the trade this way, which typically takes four or five years.* Some go straight into a program while others complete a certificate, diploma, or degree first. Apprentices undergo classroom lessons as well as on-the-job training, for which they receive a wage.
Most apprenticeships are managed by unions or other industry associations, such as:
You can also search for registered apprenticeships through the U.S. Department of Labor.
Plumbing schools tend to provide training in areas like:
- Blueprint reading
- Pipe system design
- Water supply systems
- Gas piping systems
- Drainage systems
- Installing and repairing pipes, fittings, and valves
- Brazing and soldering techniques
- Backflow principles
- Plumbing codes
- Safety protocols
Skills You Can Learn
You could begin learning how to:
- Interpret blueprints
- Calculate plumbing measurements
- Design and install piping systems in different settings
- Install, troubleshoot, and service various plumbing fixtures and appliances
- Use tools like plungers, pliers, pipe wrenches, and soldering torches
- Perform work according to relevant codes
- Follow established safety practices
- Estimate plumbing jobs
Licensing & Certification
In most states, you must obtain a license before you can officially work as a professional plumber or, in certain cases, even before you can officially start an apprenticeship. In some cases, licensing is done at the city or county level. So it's important to find out what regulations apply in your area.
There tend to be different levels of licenses, such as for apprentice/trainee, journeyman, and master.
Licensing requirements vary by locality and level. However, you will typically have to:
- Be 18 years of age or older
- Have a high school diploma or equivalent
- Have a clean criminal record (no felony convictions)
- Submit an application form and pay a fee
- Pass an exam
Some states require specialty licenses or certifications, depending on the type of work you hope to perform. For instance, you may need to get a medical gas piping license or endorsement in order to work on the systems that carry gases like oxygen and nitrous oxide in healthcare facilities. And many states have special requirements for plumbers who work with propane or natural gas systems.
Use CareerOneStop's license finder to check the requirements in your state.
Education & Training FAQs
Do plumbers need to know a lot of math?
Plumbers typically deal with basic addition, subtraction, multiplication, and division. They must also be comfortable converting decimals to fractions.
They may need to calculate things like the volume of a water tank, the water pressure at different depths, or the capacity of larger pipes versus smaller pipes. But in most cases, that means plugging numbers into a formula. Once you do that a few times, it becomes fairly automatic.
If I become a licensed plumber in one state, will my credentials be recognized in another state?
Some states have reciprocity agreements that allow licensed plumbers from certain other jurisdictions to practice the trade in that area without obtaining a new license. You can check for such agreements through the National Center for Construction Education & Research.
- New London
- Rocky Hill
- High School Diploma with Plumbing Pathway
Plumbing is a rapidly growing trade that offers the potential for high wages, stable work, and multiple avenues for advancement or specialization.
13.6% growth from 2018 to 2028
Average Yearly Openings
Length of Training
Most Common Length
Residential plumbing, commercial plumbing, gas fitting, medical gas piping, pipefitting or steamfitting, sprinkler fitting, plumbing inspection
- U.S. Bureau of Labor Statistics
- U.S. Department of Education
The median annual wage for plumbers, pipefitters, and steamfitters is $55,160, according to the Occupational Employment Statistics (OES) program. The highest earners make $97,170 or more.
Job Openings & Outlook
Bureau of Labor Statistics (BLS) projections show that employment of plumbers, pipefitters, and steamfitters is expected to grow by 13.6 percent between 2018 and 2028.
Over that same time period, an average of 66,100 jobs should become available each year. They break down this way:
- Newly created positions: 6,800
- Openings that stem from retirements: 15,600
- Openings that result from workers transferring into other occupations: 43,700
- Steady work: Since plumbing tasks are often carried out indoors, it's a year-round occupation with less chance of downtime caused by seasonal factors.
- Consistent demand: Water supply systems are crucial to our daily lives. That means plumbers are essential workers whose expertise is continually needed.
- Advancement potential: You can progress all the way to master plumber and become a self-employed contractor. Or you could pursue roles like supervisor, job estimator, inspector, and more.
What a Plumber Does
Plumbers make it possible for water, gases, wastes, and different kinds of liquids to be carried throughout all types of buildings, from homes and offices to factories and hospitals.
Common responsibilities include:
- Planning the installation of plumbing systems in accordance with safety standards, building codes, budgets, and timelines
- Ensuring that plumbing system plans work with the intended location of other necessities such as electrical panels and wires
- Preparing materials for installation by measuring, bending, cutting, and threading pipes
Preparing buildings for the installation of pipes and plumbing systems, including:
- Cutting holes in floors, ceilings, or walls
- Installing ceiling joists and hanging steel supports for pipes
Installing, testing, maintaining, and repairing items like:
- Water heaters
- Washing machines
- Garbage disposals
- Handling emergency issues like pipes that have burst or septic systems that have backed up
- Following safety guidelines and building codes
- Inspecting completed work to ensure that it's up to code
- Providing estimates for repairs
- Supervising and mentoring laborers, apprentices, and new journeymen
Plumbers can be found in any setting that has a need for running water. For example, that can include places like:
- Stores and shopping malls
- Entertainment venues
- Government buildings
- Cruise ships
- Industrial plants
- Construction sites
According to the Occupational Outlook Handbook, most plumbers, pipefitters, and steamfitters work for plumbing or heating and cooling contractors. About nine percent are self-employed.
People who go into the pipe trades can choose to specialize in a number of areas, some of which require additional training or other qualifications. Examples include:
Residential plumbing: Focus on installing and repairing pipes, fixtures, and appliances in houses, condos, and other private residences.
Commercial plumbing: Work on piping systems and appliances in large settings like office buildings, retail stores, hospitals, and schools.
Gas fitting: Install and repair natural gas piping and related appliances, such as stoves, fireplaces, water heaters, and hot tubs.
Medical gas piping: Concentrate on the systems that deliver gases like nitrous oxide and oxygen to medical patients.
Pipefitting or steamfitting: Fabricate, assemble, install, and service piping systems in commercial and industrial settings. You could deal with systems for carrying anything from chemicals for manufacturing to high-pressure steam for generating electricity.
Sprinkler fitting: Perform the installation, repair, and maintenance of fire sprinkler systems in all types of buildings.
Plumbing inspection: Check completed plumbing work to ensure that it was done properly and in accordance with applicable codes.
Which states have the highest salaries for plumbers?
Based on OES program data, these five states offer the highest average wages for plumbers, pipefitters, and steamfitters:
- Illinois: $86,120
- Alaska: $79,610
- Minnesota: $74,700
- New Jersey: $74,360
- Massachusetts: $73,970
What kind of schedule do plumbers have?
Most put in full-time hours. Residential plumbers tend to work a standard daytime schedule, but they often must be available for after-hours emergencies. Plumbers or pipefitters who work in commercial or industrial settings may work more irregular hours because their tasks may need to be carried out at off-peak times when fewer people are in the building.
What's the difference between a plumber and a pipefitter?
Plumbers tend to work with water, gas, and drainage systems and related appliances. Pipefitters mostly concentrate on the industrial side. They fabricate and install large-scale piping systems that carry more hazardous materials like acids, chemicals, and gases in settings such as power plants, oil refineries, and factories.
* Length of training information is based on a combination of information from the Occupational Outlook Handbook, the U.S. Department of Education, and a wide sampling of relevant programs from about 30 individual school websites. They are a mix of public, private non-profit, and private for-profit institutions.