What Does a Plumber Do? Duties, Types, and a Typical Day
What does a plumber do? In short, a plumber installs, repairs, and maintains the pipes, fixtures, and appliances that carry water, drainage, and gas through homes and businesses. On a given day that can mean setting a water heater, clearing a sewer line, roughing in a new build from a blueprint, or answering an emergency call at 2 a.m. The trade splits into several specialties.
What does a plumber do day to day?
Day to day, a plumber installs and connects supply lines, drain and vent piping, water heaters, and fixtures, then diagnoses and fixes what fails: leaks, clogs, low pressure, and no hot water. The mix depends on the specialty. A service plumber runs several calls a day, while a new-construction plumber may spend a week on one rough-in.
The core duties are consistent across the trade. The Bureau of Labor Statistics describes the work as installing and repairing pipes, fixtures, and the systems that move water, gas, and waste.
- Install and repair supply piping in copper, PEX, CPVC, or galvanized steel that delivers hot and cold water.
- Run drain, waste, and vent (DWV) lines that carry sewage out and let the system breathe so traps hold their seal.
- Set and service fixtures and appliances: sinks, toilets, tubs, showers, water heaters, dishwashers, and garbage disposals.
- Install and test gas piping for furnaces, ranges, and water heaters, where local code allows.
- Diagnose problems using cameras, pressure gauges, and leak detectors, then quote and complete the fix.
- Read blueprints and pull permits so the work passes inspection against the adopted plumbing code.
What are the main types of plumbers?
Plumbers specialize by the systems and settings they work in. The common tracks are residential, commercial, service and repair, and new construction, plus the related industrial trades of pipefitter and steamfitter. Sewer and drain work is often its own niche. The table below shows what each type does, where they work, and the specialty that sets them apart.
| Type of plumber | What they do | Where they work | Specialty |
|---|---|---|---|
| Residential | Install, repair, and maintain home water, drain, and gas systems and fixtures | Houses, apartments, condos | Standard fixtures, remodels, everyday repairs |
| Commercial | Build and service larger systems under stricter code, often on blueprints | Offices, restaurants, schools, hospitals | Backflow, grease interceptors, multi-story stacks, boilers |
| Service and repair | Run diagnostic calls, fix leaks, clogs, and no-hot-water problems | Homes and businesses, on call | Fast diagnosis, customer-facing, flat-rate pricing |
| New construction | Rough in and trim out plumbing as a building goes up | Construction sites | Blueprint layout, groundwork, rough-in, inspection stages |
| Sewer and drain | Clear, camera, and repair building sewers and drain lines | Homes, businesses, municipal laterals | Hydro-jetting, camera inspection, trenchless repair |
| Pipefitter | Install and maintain high-pressure pipe carrying chemicals, acids, and gases | Factories, plants, industrial sites | Process piping, welding, industrial systems |
| Steamfitter | Fit piping for systems that move steam under high pressure | Power plants, large commercial buildings | Steam and hydronic heating, high-pressure joints |
These lines blur in practice. A small-shop plumber may cover residential service and light commercial in the same week, while pipefitters and steamfitters usually train on a separate apprenticeship track. The BLS counts all of them under one occupation: plumbers, pipefitters, and steamfitters.
What does a typical service call look like?
A residential service call follows a repeatable sequence from dispatch to invoice. A tech may run four to eight of these in a day, or spend the whole day on one bigger job. The steps below show the order a working plumber moves through, from the phone ringing to getting paid.
- Dispatch and route. The office books the call, and the tech gets the address, the reported problem, and a stocked truck.
- Arrive and diagnose. Confirm the symptom, inspect the system, and find the real cause, which is often not what the customer described.
- Quote the work. Present options and a price, frequently from a flat-rate book, and get approval before touching anything.
- Shut off the water or gas. Isolate the fixture or the main so the repair stays dry and safe.
- Do the repair or install. Cut, join, and set the pipe or fixture to code, using the right material for the system.
- Test the work. Restore pressure, check for leaks, and confirm drains flow and traps hold.
- Clean up, document, and invoice. Photograph the job, note the parts used, collect payment, and offer any follow-up.
Residential vs. commercial plumbing: what is the difference?
The split comes down to scale, code, and who signs off. Residential plumbers work on smaller pipe and standard fixtures in homes, often solving problems a homeowner can point to. Commercial plumbers work on larger, stricter systems in buildings full of people, usually from blueprints and in coordination with a general contractor and inspector.
Commercial work brings equipment a house rarely has: backflow-prevention assemblies, grease interceptors, booster pumps, and long vertical waste stacks. Pipe sizes run larger, and a mistake affects dozens or hundreds of occupants, so inspection is tighter. Residential service, by contrast, rewards speed, diagnosis, and a good bedside manner, since the plumber is standing in someone’s kitchen.
What skills and tools does a plumber use?
A plumber needs mechanical aptitude, math for sizing and slope, blueprint literacy, and steady problem-solving, since much of the job is finding a fault no one can see. Physical stamina helps in crawl spaces and attics. The tools range from hand wrenches to powered machines, and the kit tells you which specialty a plumber runs.
- Hand tools: pipe wrenches, basin wrenches, channel-lock pliers, tubing cutters, and hacksaws.
- Joining tools: PEX crimp and expansion tools, press tools such as a ProPress, and a torch for soldering copper.
- Drain tools: hand augers, drum machines, and hydro-jetters for clearing lines.
- Diagnostics: inspection cameras, pressure gauges, moisture meters, and acoustic leak detectors.
- Safety and access: respirators for sewer gas, gloves, and lighting for confined spaces.
Where do plumbers work, and what are the hours?
Plumbers work in homes, commercial buildings, industrial plants, and on construction sites, often in tight spots like crawl spaces, basements, and attics. A standard day runs about 8 to 10 hours over a four or five day week. Because water and gas problems do not wait, many plumbers rotate on-call shifts covering evenings, weekends, and holidays.
The setting shapes the schedule. New-construction plumbers keep steadier daytime hours tied to the build calendar, while service plumbers face the unpredictable mix of routine appointments and emergencies. On-call work pays more per hour in many shops, which is one reason emergency response is a common way for newer techs to build income and experience.
How do you become a plumber, and what does it pay?
Most plumbers learn through a paid apprenticeship of about four to five years, roughly 8,000 supervised hours plus classroom instruction, then pass a state exam to earn a license. Median pay was $62,970 in May 2024 per the BLS, and the field is projected to grow 7 percent from 2025 to 2035, faster than average.
There is more than one route in. Some start with plumbing trade school programs before joining a shop, while others go straight into the full path to become a plumber through a union or company apprenticeship. After qualifying you reach the journeyman license tier, where you work independently, and pay climbs with experience and license level. For a full breakdown, see plumber earnings by level and state.
Frequently asked questions
What are the main duties of a plumber?
A plumber installs, repairs, and maintains the systems that carry water, waste, and gas: supply pipes, drain and vent lines, water heaters, and fixtures like sinks, toilets, and tubs. Day to day that means reading blueprints, cutting and joining pipe, diagnosing leaks and clogs, testing for code compliance, and documenting the work. Many plumbers also handle emergency calls on nights and weekends.
What is the difference between a residential and a commercial plumber?
A residential plumber works on homes and apartments: smaller pipe sizes, standard fixtures, and repairs a homeowner can see. A commercial plumber handles offices, restaurants, schools, and hospitals, where systems are larger, codes are stricter, and work often involves boilers, backflow assemblies, grease interceptors, and multi-story stacks. Commercial jobs usually run on blueprints and coordinate with general contractors.
Do plumbers work on gas lines?
In many areas, yes. Licensed plumbers install and repair the black iron or CSST piping that feeds furnaces, water heaters, ranges, and dryers, then pressure-test the line before it goes live. Gas work often requires a separate endorsement or permit depending on your state and local code, and some jurisdictions license gas fitting as its own trade.
What is the difference between a plumber and a pipefitter?
A plumber works on the potable water, drainage, and gas systems in homes and buildings. A pipefitter installs and maintains high-pressure piping that carries chemicals, acids, steam, and gases in industrial and commercial plants. The BLS groups plumbers, pipefitters, and steamfitters together, but the pipefitter and steamfitter tracks lean toward manufacturing and process piping rather than fixtures.
What skills does a plumber need?
Plumbers need mechanical aptitude, solid math for sizing and slope, and the ability to read blueprints and code books. The job rewards problem-solving, since half of service work is diagnosing what a customer cannot see. Physical stamina and manual dexterity matter for working in crawl spaces and attics, and customer communication decides whether a service tech keeps the account.
Is being a plumber a good career?
For many people, yes. The Bureau of Labor Statistics projects 7 percent job growth for plumbers, pipefitters, and steamfitters from 2025 to 2035, with about 42,000 openings a year, and median pay of $62,970 in May 2024. You can earn while you train through an apprenticeship, and licensed plumbers can move into contracting or run their own shop.
Last reviewed: September 2026.