How to Become a Plumber

Plumbing is one of the most recession-proof trades in the country. Every building needs water in and waste out, and when something goes wrong, it can't wait. If you're considering plumbing as a career, this guide covers the full path from first steps to running your own jobs as a licensed master plumber.

What Plumbers Actually Do

Plumbers install, repair, and maintain the systems that move water, gas, and waste through buildings. The work breaks down into several specializations.

Residential plumbers handle new construction rough-in, fixture installation, water heater replacement, drain cleaning, and leak repair in homes. Most apprentices start here; the work is accessible and the demand is constant.

Commercial plumbers work on larger systems in office buildings, hospitals, hotels, and retail spaces. More complex installations, larger pipe sizes, and higher pay than residential.

Pipefitters specialize in industrial piping systems: steam, chemical, and process piping in factories, refineries, and power plants. Often represented by the same union (UA) as plumbers but a distinct trade with its own licensing path.

Service plumbers focus on repair and maintenance rather than new construction: diagnosing problems, clearing blockages, and replacing failed components. High demand, often higher hourly rates for emergency calls.

Most plumbers move between residential and commercial work depending on where the opportunities are. The core skills transfer across all categories.

The Path: Apprentice → Journeyman → Master

Apprentice (Year 1–5)

Plumbing apprenticeships are typically five years, slightly longer than electrical. You work full-time on job sites while attending classroom instruction evenings or weekends. Starting pay is usually 40–50% of journeyman scale with raises every six months.

Journeyman Plumber

After completing your apprenticeship hours and passing your state's journeyman exam, you're licensed to work independently on most plumbing jobs. What journeymen earn depends on region, sector, and employer; see pay by state and metro below.

Master Plumber

With additional experience (typically 2–4 years as a journeyman) and a master's exam, you can pull permits, supervise apprentices, and run your own contracting business. Requirements vary by state.

How to Get Started

Union Apprenticeship

The United Association of Plumbers and Pipefitters runs apprenticeship programs through local unions nationwide. Structured training, strong wages, employer-paid benefits, and a portable journeyman card. Applications typically open once or twice a year; check ua.org/locals for your nearest local.

Non-Union Apprenticeship

PHCC (Plumbing-Heating-Cooling Contractors Association), ABC (Associated Builders and Contractors) chapters, and other contractor associations sponsor apprenticeship programs in most states. The same licensed journeyman credential at completion, with wages and benefits varying by employer.

Trade School + Apprenticeship

Some community colleges and trade schools offer 1–2 year plumbing programs that provide a foundation before entering a formal apprenticeship. Costs money rather than paying you, but can be a useful path if apprenticeship slots are limited in your area.

All three paths lead to the same licensed journeyman credential. Pick based on what's available in your market.

State Licensing Requirements

Plumbing licensing is state-regulated and requirements vary more than almost any other trade. Most states require documented apprenticeship hours between 8,000 and 10,000 depending on the state, passing a state journeyman exam, ongoing continuing education for license renewal, and a separate master plumber exam with additional experience for contractor licensing. A handful of states regulate at the city or county level rather than statewide. Always check your state's contractor licensing board before starting.

Job Outlook

Demand for plumbers is strong and projected to remain so. Key drivers include aging infrastructure requiring replacement and repair, new residential and commercial construction, growing demand for gas line work tied to new construction, and a significant generational gap as experienced workers retire faster than new ones enter the trade.

Is This the Right Career for You?

Plumbing suits people who like problem solving, don't mind physical work, and are comfortable working in tight spaces: crawl spaces, wall cavities, under sinks. The work involves heavy lifting, awkward positions, and occasional exposure to unpleasant conditions. It's a strong fit if you want a stable, well-paid career without college debt and don't want to be stuck at a desk. Plumbers rarely struggle to find work, and experienced journeymen with a good reputation can build a client base that provides consistent income for decades.

Next Steps

Find apprenticeship programs in your area: check both UA locals at ua.org and PHCC chapter programs at phccweb.org. Contact your local union or contractor association and ask when applications open and what the requirements are. Get your basics in order: high school diploma or GED, valid driver's license, ability to pass a drug test. The apprenticeship application timeline is usually 6–12 months from first inquiry to first day on the job. Start now.