The Gas Line Checklist: 7 Questions to Ask Before Hiring a Plumber

Gas lines aren't flashy. They don't sparkle like new countertops or get compliments like hardwood floors. But they matter a lot. If you're installing a new gas appliance, remodeling your kitchen, or dealing with an aging line, it's not something to put off. And not something to DIY.

You need a gas line plumber. But not just any plumber with a wrench and a business card. You need someone who knows what they're doing, plays by the rules, and treats your home like theirs. The problem is, most people don't know what to ask when they're hiring. So here's a simple checklist to help you figure it out—before anyone touches a single pipe.

Are you licensed to do gas line work?

This one sounds obvious, but you'd be surprised how many people skip it. Just because someone has "plumber" on their truck doesn't mean they're cleared to install or repair gas piping. And yes, there's a difference.

In New Jersey, working with gas lines requires a license. Not a general one—a specific certification that proves they're trained in pressure testing, leak detection, appliance hookups, and local code compliance. Don't feel awkward asking. You're not being nosy; you're being responsible.

Have you worked on systems like mine?

Here's where things get more personal. Say you're adding a gas stove and or replacing a pool heater. You could run a line to the patio for that dream grill setup. Different appliances have different needs—pipe sizing, BTU loads, venting, shutoffs, you name it.

So ask, "Have you installed gas lines for this exact type of appliance?" If they have, great. Ask them what challenges typically come up and how they handle them. If they haven't? Keep looking.

What safety checks do you run—before and after the job?

Installing a gas line isn't just about hooking up the pipe. It's about pressure testing it, inspecting joints and seals, and making sure not even a whisper of a leak slips through.

The good ones will talk about test gauges. They'll mention shutoff valves. They'll explain how they check for leaks using more than just their nose. This isn't an area where "we always do it right" is enough. You want details. You want steps. You want proof that they're thinking three steps ahead of the problem.

Will I get a written estimate that covers everything?

If they give you a vague verbal quote—or worse, say "we'll figure it out"—you're asking for trouble. Every legit gas line plumber should give you a detailed, written estimate that breaks down labor, materials, permits (if required), and any add-ons.

And while at it, ask what kind of piping they plan to use. Black iron? CSST? Will they need to reroute lines or go through walls? If the estimate is precise, their process is too. If it's confusing, run.

What's your plan if my old gas lines aren't in great shape?

A lot of homes have gas lines that were installed decades ago. That may mean rust, corrosion, questionable fittings, or outdated work. So ask them, "What happens if you find something unsafe once you start the job?"

The answer should not be "we'll deal with it." You want to hear how they evaluate existing lines, what standards they follow, and whether they'll recommend a complete replacement or spot fixes. And most of all, you want to hear that safety comes first.

How soon can you start—and what happens in an emergency?

Gas line work can't always wait. If you're in the middle of a kitchen reno or smell something suspicious, you need to know the plumber can respond quickly and stick to a timeline.

Ask when they're available, how long the job will take, and whether they offer emergency support. Delays might leave you without heat, hot water, or a functioning stove—none of which are fun when you've got a family to feed or a cold front coming in.

Do you offer any warranty or follow-up?

Let's face it—stuff shifts. Fittings loosen. Pipes settle. You're not being paranoid by asking what happens if you notice something odd a week or two after the job's done.

A confident gas line plumber will stand by their work. They'll explain their warranty policy (if they have one) and tell you how to reach them if something feels off. It's not about expecting problems—knowing someone has your back if they come up.

One last thing

Hiring someone to work on your home's gas system isn't a casual decision. It's not a quick quote-and-go. It's a trust thing. The right plumber won't make you guess. They'll explain what they're doing, why they're doing it, and how they'll keep your home—and your family—safe.

Ask the questions. Take notes. Listen to your gut. Because once the gas is flowing, you want to feel 100% confident the job was done right. No guesswork. No crossed fingers. Just safe, solid work from someone who knows their craft.

If you're in need of a licensed, experienced gas line plumber who takes safety and service seriously, Zeek Plumbing is a team worth talking to. They’ve handled everything from appliance hookups to full system installs, and they know how to get the job done right—the first time.