How to choose a plumber you can trust

Verify the credentials

Ask for the license number and check it with your state or local board. Confirm the plumber carries liability insurance, and workers’ compensation if they have a crew. These are quick asks, and a reputable plumber answers them without hesitation.

Get itemized quotes

For any real job, get two or three quotes that break out parts, labor, permits, and any add-ons separately. An itemized quote is the only way to compare fairly, because a lower total sometimes just means less work is included. If a quote is a single lump sum, ask for the breakdown.

Ask the right questions

• What exactly is included, and what would be extra?
• Is a permit required, and is it in the price?
• What warranty comes with the parts and the labor?
• Who does the work, the person quoting or a subcontractor?
• What happens if you find a problem once the job is opened up?

Watch for red flags

Be cautious with high-pressure sales, refusal to put anything in writing, no verifiable license, cash-only demands, or a large deposit before any work begins. None of these on their own proves bad intent, but together they are a reason to get another quote.

A note on low water pressure

Low water pressure is one of the most common reasons homeowners call a plumber, and the cause ranges from trivial to significant. A single slow faucet is often a clogged aerator or cartridge you can clean or replace cheaply. Low pressure across the whole house can point to a failing pressure regulator, a partially closed main valve, corroded galvanized pipe, or a hidden leak. If it came on suddenly and affects everything, have it checked, since it can be an early sign of a bigger plumbing problem such as one that leads to a repipe.

Know the range first

The single best thing you can do before hiring is to know what your job should cost. Start with the relevant cost page, from water heater replacement to drain cleaning, so you can tell a fair quote from an inflated one.