Gas line work is for licensed pros — and only after any active leak has been made safe by the gas company. Here is how we repair, replace, and test gas lines to code.
Written bySteven Lockhart·Reviewed byMiguel Lopez, Owner & Licensed Plumber, New Pro Plumbing (CSLB #974600)·Last reviewedAugust 2026 · 8 min readQuick Answer
Gas line repair should always be done by a licensed plumber, and only after any active leak has been made safe by the gas company. New Pro repairs, replaces, and installs gas lines — for appliances, additions, and corroded or damaged lines — then pressure-tests and permits the work. If you smell gas right now, stop: leave and call 911 from outside.
Gas lines carry an obvious hazard, so repairing, replacing, or extending them is licensed, permitted work — not a job to attempt yourself. New Pro repairs corroded or damaged gas lines, replaces failing sections, and installs new lines for appliances like ranges, dryers, water heaters, and fire pits or additions. Every job is pressure-tested and inspected before gas flows again.
Gas line repair — Gas line repair is the licensed repair, replacement, or installation of natural gas piping — pressure-tested, permitted, and inspected — performed only after any active leak has been made safe by the gas utility.
If you have an active leak right now, this is not the first step — leave and call 911, then your gas company. Once the utility has made the property safe, an emergency plumber handles the actual line repair.
This page is for repair, not an emergency. If you smell gas, leave and call 911 — see what to do in a gas leak.
A rotten-egg smell can be sewer gas, not natural gas — see sewer gas smell once a gas leak is ruled out.
A careful, tested, permitted process — after it is safe.
We work only after any active leak is made safe by the utility.
We locate the line and isolate the section to be repaired.
We repair the damaged section or replace a corroded run.
We pressure-test the line to confirm it holds and does not leak.
The work is permitted and inspected per code.
Gas is restored only once the line passes.
Gas appliance issue, not the line? A pilot that will not stay lit is usually the appliance — see water heater pilot light out — not the gas line itself.
Need a gas line repaired or run for an appliance? We are licensed for it — call us.
Get a Free QuoteGas is the one area of home plumbing where the stakes are highest and the DIY temptation should be resisted entirely. A gas leak from an improperly repaired or installed line can lead to fire, explosion, or carbon monoxide exposure, and unlike a water leak, the consequences are not just property damage. That is why every state licenses gas work and every jurisdiction requires it to be permitted, pressure-tested, and inspected — the process exists to catch the mistakes that could otherwise be catastrophic.
The testing is what makes gas work trustworthy. A finished gas line is not simply connected and turned on; it is sealed and pressurized, then watched to confirm the pressure holds with no drop that would reveal a leak, and it must pass a code inspection before service is restored. Federal pipeline-safety guidance from PHMSA reflects the same principle at the utility scale that we apply at the home scale: gas systems are verified, not assumed, before they carry gas.
That is the standard we hold to. Our gas work is done under a license you can verify with the CSLB (#974600), permitted and inspected through the Los Angeles Department of Building & Safety, and pressure-tested before service returns. And it bears repeating: none of it happens while there is an active leak. If you smell gas, the property has to be made safe by the gas company first — the repair comes after.
A localized fault is a repair; a corroded run is a replacement.
| Situation | Approach | Note |
|---|---|---|
| Localized damage | Repair the section | Tested & permitted |
| Corroded run | Replace the run | Tested & permitted |
| New appliance | Install a new line | Sized to load |
Whatever it needs, the work is tested, permitted, and inspected — that is how 24/7 emergency plumbing handles gas.
Gas line cost depends on the length and accessibility of the line, whether it is a localized repair or a full run, and the permit and testing required. Running a new line for an appliance is priced by distance and load. Because gas work is permitted and pressure-tested, those steps are part of the job — and part of the quote, which we put in writing before starting.
Permitted, tested, and quoted up front — see how our emergency plumbing service prices gas work.
A homeowner wants a gas line run to a new range in a remodeled kitchen.
New Pro sizes and installs the line to the range's load, pressure-tests it, and pulls the permit for inspection.
The range is connected safely, the line passes inspection, and the work is documented for the home's records.
The Bottom Line
Gas line work is licensed, permitted, pressure-tested territory — never DIY. New Pro repairs, replaces, and installs gas lines to code, but only after any active leak has been made safe by the gas company. If you smell gas right now, the only first step is to leave and call 911.
No. Gas line repair, replacement, and installation are licensed work for good reason — mistakes can cause leaks, fires, or explosions, and the work must be permitted, pressure-tested, and inspected to be safe and legal. A licensed plumber has the training, testing equipment, and permitting process to do it correctly. If you have an active gas leak, the priority is not repair at all: leave the building and call 911 and your gas company from outside.
Treat it as an emergency. Do not try to find or fix the leak, do not operate light switches or anything that could spark, and do not light a flame. Leave the building immediately with everyone and any pets, and from a safe distance outside call 911 and your gas company’s emergency line. Do not go back inside until they tell you it is safe. Gas line repair only happens after the utility has made the property safe.
You may need a new or replacement gas line when adding a gas appliance (a range, dryer, water heater, fire pit, or pool heater) that needs its own supply, when an existing line is corroded or damaged, when old undersized piping cannot supply enough gas to run appliances properly, or during a remodel or addition. We assess the line and the appliance load and recommend repair, replacement, or a new run sized correctly for the demand.
Yes. Gas piping work in Los Angeles requires a permit and an inspection, and the line must be pressure-tested to confirm it holds before gas service is restored. This is not optional red tape — it is what verifies the work is safe. We handle the permitting through the city and complete the testing and inspection as part of the job, so you have documented, code-compliant gas work, which also matters for your home’s records and resale.
After repairing or installing a gas line, we pressure-test it — sealing the line and applying air pressure, then monitoring it to confirm it holds steady with no drop, which would indicate a leak. The line has to pass this test and a code inspection before gas is turned back on. This testing is a required, standard part of professional gas work and is exactly why gas line repair is not something to attempt without the right equipment and training.
Written by the New Pro Plumbing content team and reviewed for technical accuracy by Miguel Lopez, owner and California-licensed plumber (CSLB #974600). Guidance follows U.S. EPA, CSLB, and LADBS sources where cited. Any figures reflect New Pro Plumbing's flat-rate practice and West LA conditions, not a quote — we confirm pricing in writing before any work begins.
Last reviewed: August 2026.
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