When you need a plumber — what they handle and what to expect
This article is for educational purposes only and is not a substitute for professional advice. Local codes, regulations, and best practices vary by region.
Plumbers handle water delivery, drainage, and gas lines. Plumbing work is technical, code-regulated, and requires licensing in most jurisdictions. Some plumbing tasks you can DIY. Most require a licensed plumber.
Understanding what plumbers do and when to call one saves money and prevents mistakes.
What Plumbers Do
Install and repair water supply lines (the pipes bringing water to fixtures).
Install and repair drain lines (the pipes taking waste away).
Install and repair gas lines (for gas appliances).
Install fixtures (sinks, faucets, toilets, water heaters, dishwashers, washing machines).
Troubleshoot leaks, low pressure, slow drains, or other water issues.
Handle backups and sewer line problems.
Licensed vs. Unlicensed Plumbing Work
Most jurisdictions require a license for plumbing. This means the plumber has passed an exam and met experience requirements.
Some jurisdictions require permits for plumbing work. A licensed plumber obtains permits, schedules inspections, and ensures compliance.
Work done without required permits or licenses creates problems for you (failed inspections, liability, home value issues, insurance claims denied).
Hire a licensed, permitted plumber for any work requiring permits or licenses in your jurisdiction.
Common Plumbing Tasks You Might Handle DIY
Replacing a faucet (if the shutoff valve is accessible and you’re comfortable making connections).
Replacing a toilet (if the floor flange is in good condition).
Clearing a simple drain clog (using a plunger or snake).
Replacing supply lines under a sink (if they’re flexible and you can access the connections).
Tasks Requiring a Plumber
Anything behind walls (replacing hidden pipe, rerouting lines).
Installing new fixtures (sinks, showers, water heaters require proper installation and connections).
Gas line work (always requires a licensed plumber for safety).
Main water shutoff issues.
Sewer line problems.
Backups or slow drains if DIY methods don’t work.
Any work requiring permits or inspections.
Cost Expectations
Plumbers typically charge $75 to $150 per hour, plus materials.
Service calls (for diagnostics or minor repairs) might be $100 to $300.
Fixture installation is usually $150 to $500 per fixture, depending on complexity.
Major work (new lines, sewer repair, water heater replacement) costs $500 to $5000+.
Emergency service (nights, weekends, holidays) costs more.
Get quotes before committing. Plumbing costs vary based on complexity and location.
Finding a Plumber
Ask for recommendations from friends who’ve recently had plumbing work.
Check online reviews and ratings.
Verify licensing with your state or local licensing board.
Confirm insurance and bonding.
Get at least three quotes for significant work.
Working with a Plumber
Describe the problem clearly. “Slow drain in the kitchen sink” is clearer than “Something’s wrong.”
Ask about the diagnosis before agreeing to repairs. “What’s the problem and what’s the solution?”
Get a written quote before work starts.
Understand what’s included (labor, materials, disposal).
Ask about warranty. Most plumbers warranty their work for 1 year.
Red Flags
A plumber who won’t provide a license number or won’t let you verify it.
A plumber who recommends replacing things rather than fixing them (unless truly necessary).
A plumber who rushes through diagnosis.
Significantly lower prices than other quotes (they might cut corners).
A plumber unwilling to get permits or pull inspections for code-required work.
DIY Cautions
You can replace a faucet or toilet yourself if you’re comfortable. Watch videos, take your time, and don’t force things.
Never do gas line work yourself. This is dangerous and always requires a professional.
Never reroute supply or drain lines yourself unless you truly understand plumbing codes. Mistakes cause leaks and water damage.
If you’re unsure, call a plumber. A small repair done wrong creates big problems.
The Reality
Plumbers are specialists. Plumbing code violations, leaks, or backups create serious damage. Hire a licensed, insured professional for anything beyond simple fixes.
A good plumber saves you money by diagnosing problems correctly and fixing them properly the first time.
© The Whole Home Guide