How to Hire a Plumber: Licenses, Quotes, and Red Flags

Most states license plumbers at the journeyman or master level — look the license number up on your state licensing board's website rather than taking a number on a truck at face value. Licensing means tested competence and accountability to a board; it is the single strongest filter between professionals and handymen with a wrench.

Confirm general liability insurance and, if they have employees, workers' compensation. Ask for proof — a legitimate pro provides it without drama. If an uninsured worker is injured on your property or causes water damage, the liability conversation gets unpleasant fast.

A written quote should spell out the scope (exactly what will be done), the price structure, what is included and excluded, and how changes are handled. 'We will fix the leak: $X' is not a scope; 'replace failed 3/4" copper section under kitchen sink, includes drywall patch' is.

Understand the pricing model before work starts. Flat-rate pricing quotes the job; hourly (time and materials) bills the clock plus parts. Neither is inherently better — flat rate rewards efficiency, hourly can be fairer for exploratory work like leak detection — but you should know which one you agreed to and what triggers extra charges.

Ask about warranties separately for labor and parts — a one-year labor warranty is a common professional standard, and manufacturer parts carry their own terms. Ask who will actually do the work (the person quoting or an employee/apprentice), whether cleanup is included, whether permits are needed and who pulls them, and what the timeline looks like.

Also ask how they handle surprises. Behind-wall and under-slab work can reveal bigger problems mid-job; a good pro explains how change orders are priced and approved before touching anything beyond the agreed scope. Get that policy in the written quote.

Walk away from demands for full payment upfront — a deposit for large jobs is normal, full prepayment is not. Be wary of anyone who cannot produce a license number, quotes only in cash, refuses to put anything in writing, or pressures you to decide 'today only' on non-emergency work.

Other warning signs: no physical business presence or verifiable reviews, drastically underbidding every competitor (corners get cut somewhere), and diagnosing a full repiping over the phone without looking at anything. Trust pros who inspect first and explain in plain language.

In an emergency, your job before the plumber arrives is to stop the damage: shut off the water (main or fixture valve), kill power to wet areas safely, and move belongings. Then describe symptoms precisely — where the water is, when it started, what you shut off — so the pro arrives with the right parts.

Ask about emergency or after-hours fees before they roll a truck, and understand what is being fixed versus what is temporary. A 2 a.m. visit that stops the leak and a next-day return for the permanent repair is standard practice, not upselling.

FlowFast Plumbing is a free referral service — we are not a plumbing company and we do not perform the work. When you request help, we share your details with up to three independent local plumbing pros so they can contact you about your project.

You compare them, check their licenses yourself using the guidance above, and hire the one you choose — working directly with that pro from there. The referral costs you nothing; the pros pay for the connection.