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Smell Gas in Your Home? A Texas Homeowner's Action Plan

Rotten egg smell = leave the house first. Here's exactly what to do and what to avoid.

Published December 1, 2025 5 min read
Gas leak safety action plan for a Texas home

Natural gas and propane are both odorized with a chemical called mercaptan that smells like rotten eggs, specifically so leaks can be detected before they reach ignition levels. If you smell that odor inside your home, garage, or near an appliance, treat it as a life-safety emergency — not a plumbing inconvenience.

Step 1: Leave the Building Immediately

Get everyone (including pets) out. Do not use garage door openers, do not switch lights on or off, do not unplug appliances. Even the small electrical spark from a light switch can ignite gas. Don't stop to gather belongings.

Step 2: Call From a Safe Distance

Once outside and at least 50 feet from the house, call us at (831) 290-4327 for licensed gas response, and Atmos Energy at 1-866-322-8667 to report the leak. Both numbers are 24/7.

Step 3: Do Not Re-Enter Until Cleared

Don't go back inside for phones, pets already outside, or valuables. Emergency responders and plumbers will tell you when it's safe to re-enter.

Step 4: Ventilate Only If Instructed

If a first responder or licensed plumber tells you to open windows, do so carefully. Otherwise leave the building sealed as-is until we arrive.

How We Handle a Gas Call

On arrival we shut the gas at the meter, ventilate, and use combustible-gas indicators (CGI) to detect the leak location. Soap-bubble testing on fittings and CSST joints pinpoints the exact leak. We repair with black iron or approved CSST, properly bond to the electrical ground, pressure-test at 3 PSI for the code-required minimum time, and restore service. Every gas repair is permitted through the City of Leander or Williamson County.

Signs of a Slow Gas Leak

  • Occasional rotten-egg smell that comes and goes
  • Dead vegetation in a straight line across the yard
  • Higher-than-normal Atmos Energy bill without any usage change
  • Hissing sound near a gas appliance or meter
  • Yellow (not blue) flames on a gas cooktop or water heater

How Natural Gas Leaks Actually Happen in Central Texas Homes

Gas leaks in a Leander home come from a limited set of failure points: a corroded flex connector at the water heater or range (most common — flex is a wear part and dies at 15-20 years); a loose fitting behind a range that gets bumped during move-in; a cracked yellow CSST run struck by a nail or screw during a remodel; a corroded buried service riser where the gas line comes up out of the ground; or a lightning-struck CSST run that wasn't properly bonded to the electrical system (a real risk on 2000s-2010s installs before the current NEC bonding requirement).

Each failure point has a signature: a rotten-egg smell near an appliance points at a flex or fitting; a smell outside near the meter points at the service riser; a hissing sound in a wall points at a struck CSST run. Our combustible-gas detector confirms location in seconds — no guessing, no soapy water on-the-fly.

The Legal and Insurance Consequences of DIY Gas Work in Texas

Texas law is unambiguous on this: residential natural gas work requires a licensed Responsible Master Plumber with an active natural-gas or LP endorsement — not a handyman, not a general contractor, not a homeowner with a wrench. Unpermitted gas work voids most homeowners insurance policies. If a future gas leak causes a fire, an insurer that discovers unpermitted DIY gas work has grounds to deny the claim entirely.

The permit and inspection process is not bureaucratic gatekeeping — it's the paperwork trail that protects the homeowner if something ever goes wrong. Our permit + inspection closeout on every gas job is the reason insurance carriers cover the resulting installation.

What Happens After You Report a Gas Smell in Leander

The sequence: (1) you and everyone in the house leave — with pets, no light switches, no phones inside the house; (2) call us from outside at (831) 290-4327 — a licensed plumber picks up 24/7; (3) if the smell is strong or persistent, also call 911 and the utility (Atmos, CenterPoint depending on your service); (4) we dispatch a Master Plumber to your Leander address, usually inside 60 minutes; (5) we sweep with a combustible-gas detector, isolate at the meter, repair the failed component, pressure-test the run, and pull a permit under our RMP license; (6) City of Leander inspector closes the record and you get the paperwork.

Need help right now?

Call (831) 290-4327 — a licensed plumber picks up 24/7.

Related Questions

Natural gas is odorless on its own — utilities add mercaptan, a sulfur compound, specifically so leaks smell like rotten eggs or sewer. If you smell rotten eggs and it's not the neighbor's compost pile or a nearby drain trap that's dried out, treat it as a gas leak. Some people are less sensitive to the odor; if you're not sure, err on the side of caution and get everyone out.

Yes, at high enough concentrations. Natural gas itself displaces oxygen in the air, which causes headache, dizziness, nausea, and eventually unconsciousness. Long before that concentration is reached, the smell should drive everyone out. If anyone shows symptoms, get outside immediately and call 911 as well as a plumber.

Depends entirely on the failure point. A corroded flex connector at the water heater or range typically runs $250-$550 including the pressure test. A cracked CSST run inside a wall runs $600-$1,800 depending on access. A buried service-riser repair runs $1,200-$3,500. The permit and inspection are always included in our flat-rate quote — no separate line item.

Ready to solve your plumbing problem?

Call (831) 290-4327 — a licensed plumber picks up 24/7. Same-day service across Leander and Williamson County.

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