Gas Line Repair & Installation · Los Angeles & SoCal
Gas line work done safely, to code, the first time.
Gas leak repair, new gas lines for appliances, and pressure testing.
Gas lines aren't a DIY job. We locate and repair leaks, run new lines for tankless water heaters, ranges, dryers, fireplaces and BBQs, and pressure-test the system before it goes back into service.
Every job is permitted where required and done to code by a licensed plumber — the same team that installs tankless heaters, which often need a larger gas line.
Signs you need this
- A rotten-egg (sulfur) smell near an appliance or meter
- A hissing sound near a gas line
- You're adding a gas appliance or BBQ
- Upgrading to a tankless water heater
What's included
- Gas leak detection and repair
- New gas lines for appliances, BBQs and fireplaces
- Gas line upsizing for tankless water heaters
- Pressure testing and permits where required
Why Leon Plumbing
- Licensed since 1983 — CSLB C-36 #474827
- Emergency calls answered 24/7
- Members save 10% on service labor
Gas Line Repair & Installation: common questions
What should I do if I smell gas?
Leave the building immediately and move to a safe location away from the suspected leak. Do not operate light switches, electrical appliances, garage doors or phones inside, and do not light flames or try to find or repair the leak yourself. From a safe location, call your gas utility's emergency number or 911. Keep others away and do not re-enter until emergency responders or the utility say it is safe. Once the immediate hazard is controlled, contact us to assess and repair the affected gas piping.
Do I need a bigger gas line for a tankless water heater?
Often an upgrade is needed, but it must be calculated rather than guessed. A gas tankless heater can have a higher firing demand than a storage-tank model. The required line size depends on the appliance rating, pipe length, available gas pressure and the combined load of other appliances on the system. We evaluate the piping and meter requirements before installation and explain any upgrades or utility coordination needed. An undersized supply can cause ignition faults or inconsistent operation, so proper sizing is part of planning the job.
Gas Line Repair & Installation near you
Google reviews
What Leon Plumbing customers say
Leon Plumbing on Google
4.9 out of 5 · 129 reviews
“Leon Plumbing’s team were great to work with! I had a minor leak coming from my kitchen sink and the team came out immediately and fixed the problem. Communication was easy and straightforward. Thank you to our tech Mario and Datevig and Sevan for a smooth experience!”
Erika Liu Wong
via Google“I needed a service for a Rinnai tankless water heater for a tenant in Eagle Rock. I called Leon plumbing and was surprised that they could have a tech out in about an hour. The tech did a complete service for $275, which seemed somewhat reasonable, and a needed valve replacement for another $275, which (though steep) was at least done quickly. I would recommend them for speed, good communications, and quality of the work.”
Steve Wolf
via Google“Excellent service! Sevag was super helpful and the team came out very quickly, fixed our water heater and made the whole process easy. We are extremely happy with their outstanding work and we highly recommend them!”
Despina Spanidou
via Google“As always, excellent service. This is my go-to plumber. Reliable, responsive, efficient.”
Steven Graubard
via Google“Very good service and anytime I call ready for the service god bless them 🙏”
Kevork Ashjian
via Google“⭐⭐⭐⭐⭐ Sevag is excellent! He is professional, reliable, and knowledgeable, and takes pride in doing quality work. He explains everything clearly, is dependable, and makes sure the job is done right. It’s hard to find someone you can trust, and Sevag definitely delivers! I highly recommend him to anyone looking for outstanding plumbing services.”
Joseph Khankhanian
via GoogleLatest written reviews from our main Leon Plumbing listing · Updated Oct 30, 2026
Gas & Commercial in our core communities
Leon Plumbing Advantage
Pay less for every plumbing visit — for $34.99/mo.
- Free $149 whole-home inspection
- $99 dispatch fee waived*
- 10% off all repairs & labor
- Same / next-day priority
- 2-year workmanship warranty
- 50% off after-hours premium