Gas Line Repair in Keller TX: What to Do, What a Plumber Fixes, and What It Costs

By Brent Applegate, Licensed Master Plumber | Polly Plumbing | License No. RMP-42199 Serving Keller, Southlake, Colleyville, Flower Mound, North Richland Hills, Grapevine, Fort Worth, Arlington, Trophy Club, Roanoke, and all of Tarrant County. Based in Keller, TX.

Gas Line Repair in Keller TX: What to Do, What a Plumber Fixes, and What It Costs

If you smell gas right now: stop reading, leave the home immediately, and call 911 or Atmos Energy’s 24-hour emergency line at 1-866-322-8667 from outside the building. Do not use light switches, phones, or any electrical device inside the home before leaving.

If the immediate emergency has passed — the utility has already been out, the gas is shut off, and you are now in a stable situation researching next steps — this guide is for you.

Gas line repair in Keller involves three distinct scenarios, and understanding which one you are in determines who you call and in what order.

Scenario 1: You smelled gas, evacuated, called 911 or Atmos Energy, the utility came out and confirmed a leak, and they have shut off your gas supply at the meter. You need a licensed plumber to find and repair the leak before Atmos will restore service.

Scenario 2: Your gas appliance stopped working and a technician told you there is a supply issue or a valve problem — not an emergency leak, but a repair that needs a licensed plumber.

Scenario 3: You are planning a kitchen remodel, adding a gas appliance, or moving a gas line for a renovation and need a licensed plumber to do the work to code.

All three land on the same answer: call Polly Plumbing at (817) 286-3446). But the path from here is different for each scenario, and understanding what is involved helps you know what to expect.

Why Keller Gas Lines Need Attention

Gas line issues in Keller are not random. There are predictable reasons why homes in specific eras of construction are more vulnerable.

Older Keller homes (built pre-1990) have black iron pipe. Black iron pipe with threaded connections was the standard for interior gas distribution in North Texas construction through the late 1980s. If your older Keller home has black iron gas pipe, the supply side water lines in the same home are likely galvanized steel of the same era. See our whole home repiping guide for what that means and what it costs to address.

Black iron pipe itself does not corrode under normal indoor conditions. The joints are the vulnerability. A home with original black iron pipe from the 1970s may have 20 to 40 threaded connections throughout the house. Any one of them can develop a slow seep over decades of thermal cycling — expansion and contraction from the heating and cooling cycles the pipe experiences every time a gas appliance fires.

Winter Storm Uri (February 2021) stressed gas connections throughout Tarrant County. The extreme cold event exposed weaknesses in exterior gas line connections, meter loops, and the flexible connectors that attach appliances to wall stub-outs. Many Keller homeowners had repairs made during and after Uri, but some homes that had slow seeps that developed during the thermal stress of that event have never been formally inspected since.

Flexible connectors age and fail. The corrugated stainless steel or brass flex connectors that attach gas appliances — water heaters, ranges, dryers, furnaces — to the wall stub-out have a rated service life of 10 to 20 years. In Keller homes where these connectors are original to the appliance installation, a water heater connected in 2003 may have a 22-year-old flex connector. Brent checks the connector condition on every gas appliance service call.

A Real Call: The Smell That Turned Out to Be One Fitting

Helen called on a weekday morning from her home in an established Keller neighborhood near Bear Creek Parkway. She had smelled a faint sulfur odor near the kitchen range for several days — not strong, nothing alarming, but persistent. She had not evacuated. She had not called the utility. She wanted to know what to do.

Brent’s response was clear: the correct first step for any gas odor is to leave the home and call Atmos Energy to verify the situation before dismissing it. Helen agreed and made the call. Atmos came out within the hour, confirmed a very small pressure loss in the line serving the range, shut off the gas at the meter, and told her to call a licensed plumber.

Brent arrived that afternoon with a combustible gas leak detector. The source was the threaded fitting at the back of the range’s wall stub-out — a 1987 black iron fitting that had developed a microseep at the compound. The fitting was 38 years old and the compound had shrunk enough to allow a barely-detectable trace of gas through the joint.

The repair was straightforward: disassemble the fitting, clean the threads, apply new gas-rated thread sealant, reassemble, and pressure test the repaired joint. Total time on the repair itself: about 45 minutes. Atmos returned to verify the repair, confirm pressure integrity, and restore service.

Helen’s home was never in dramatic danger. The leak rate was very small. But she was right to call. A microseep at a fitting can become a larger seep as the compound continues to deteriorate, and the line behind a range is not a place to experiment with monitoring it.

The outcome was the one that everyone involved hoped for: identified early, repaired cleanly, family safe, gas restored the same afternoon.

What a Licensed Plumber Does on a Gas Line Call in Keller

Scenario 1: Post-utility shutoff leak repair.

When Atmos Energy shuts off gas at the meter due to a confirmed leak or failed pressure test, they give the homeowner a tag describing what needs to be done before they will restore service. Typically this requires a licensed plumber to locate and repair the leak, then call Atmos to witness a pressure test before restoration.

Brent arrives with an electronic combustible gas detector. He pressurizes the gas system and methodically checks every connection — appliance flex connectors, stub-out fittings, shut-off valves, and threaded joints throughout the gas distribution line. When the detector identifies the leak source, he repairs or replaces the failed component, re-pressurizes, and verifies the repair is leak-free before calling Atmos.

Scenario 2: Appliance supply or valve issue.

A gas appliance that has stopped working may have a failed gas valve — the internal valve that controls gas flow to the burner assembly. A water heater gas valve failure, for example, means the pilot will not stay lit and the burner will not fire. This is an appliance component replacement that Brent performs as part of a standard water heater repair call. The gas line itself is not the issue in this scenario — the appliance’s internal gas control is.

Gas valve replacement cost on a water heater: $620 to $1,030. This is a legitimate repair on a unit that is otherwise in good condition.

Scenario 3: Gas line extension, relocation, or new installation.

Adding a gas line for a new appliance, extending the line to a gas range being added in a remodel, running a new line for a gas dryer or outdoor grill connection — these are new installation projects that require a permit from the City of Keller’s Development Services Department. Brent handles the permit as part of the project scope. All new gas line work in Keller is inspected by the city before being placed in service.

Gas Line Repair Costs in Keller TX

Gas line repair costs vary significantly based on the specific issue and scope.

All pricing includes labor and materials with a written quote before any work begins. Gas line work in Keller requires a permit for new installations and significant alterations — Brent handles the permit process as part of the project. No emergency surcharge.

Keller Gas Line Code and Permit Requirements

The City of Keller requires a permit for gas line installation and significant repairs. Brent coordinates with Keller Development Services and schedules the required inspection as part of every permitted gas line project.

Gas line work must be done by a licensed Master Plumber — not a handyman, not a general contractor, not an unlicensed individual. The City of Keller enforces this requirement and will fail an inspection if the work was not performed by a licensed plumber. If you are getting quotes for gas line work and any contractor offers to do it without a permit, that is a liability that transfers to you as the homeowner if there is ever an insurance claim or an inspection.

Atmos Energy is the natural gas utility serving Keller. Their 24-hour emergency line is 1-866-322-8667. They respond to gas odor reports and suspected leaks at any hour at no charge to the homeowner. Their role is to verify the safety of the service line from the meter to the home and to shut off or restore service. The plumber’s role is to repair the interior gas distribution system after the utility confirms the source and scope.

Signs of a Gas Leak That Are Not Always Obvious

Not every gas leak smells strongly of sulfur. Some are subtler. Brent recommends calling for an inspection — not necessarily an evacuation, but a professional check — if any of these apply to your Keller home:

Dead or yellowing vegetation in a strip following your yard above the buried gas line run. Gas escaping from an exterior underground line prevents oxygen from reaching plant roots. A line of dead grass in an otherwise healthy lawn, tracking the route from the meter to the home, can indicate a buried line failure.

A hissing sound near a gas appliance or the meter. Any audible sound from a gas connection point is a call. Do not investigate the source yourself.

Headaches, dizziness, or nausea that improve when you go outside. Carbon monoxide from combustion issues presents differently from a gas leak, but both warrant immediate investigation. If symptoms are present: leave the home, get fresh air, call 911.

A meter or outdoor gas line that is covered in frost when it is not freezing outside. Rapid gas expansion can cause localized cooling. Unusual frost on a meter or fitting is a call.

Persistent smell that is faint but recurring in one specific room. Helen’s situation. A faint recurring sulfur odor that is not dramatic but keeps coming back is not something to wait on. A professional check with a combustible gas detector takes less than an hour.

What Polly Plumbing Does on Every Keller Gas Line Call

When you call Polly Plumbing for gas line service in Keller or any surrounding Tarrant County city, Brent assesses the scenario before arriving. If the gas is already off and the utility has been involved, he arrives prepared to locate and repair the source, perform a pressure test, and coordinate with Atmos for restoration. If the call is non-emergency, he arrives with the combustible gas detector and a full pressure test protocol.

Every gas line repair is documented in writing. If a permit is required, the permit is pulled before work begins. Pressure test results are documented and provided to the homeowner and to Atmos Energy as required for service restoration.

For Grapevine gas line service see our Grapevine gas lines page. For water heater gas valve issues see our water heater repair guide for Keller TX.

Service areas: Southlake, Colleyville, Flower Mound, North Richland Hills, Grapevine, Fort Worth, Arlington, Trophy Club, Roanoke, and all of Tarrant County.

Call (817) 286-3446 any time. Live agents answer 24/7. No emergency surcharge.

Frequently Asked Questions About Gas Line Repair in Keller TX

What do I do if I smell gas in my Keller TX home?

Leave the home immediately. Do not use light switches, phones, or any electrical device before exiting. Once outside, call 911 or Atmos Energy’s 24-hour emergency line at 1-866-322-8667. Do not re-enter until Atmos or emergency services confirms it is safe. After the utility has assessed the situation and shut off the gas if necessary, call Polly Plumbing at (817) 286-3446 to locate and repair the leak.

How much does gas line repair cost in Keller TX?

Fitting or joint repair for a single leak source runs $280 to $520. Flex connector replacement runs $195 to $380. Gas shut-off valve replacement runs $280 to $480. Gas valve replacement on a water heater runs $620 to $1,030. Full gas line segment replacement is quoted on site. The $89 dispatch fee is waived for PollyCare members. Written quote before any work begins. Call Polly Plumbing at (817) 286-3446.

Can I smell a gas leak if it is very small?

Small gas leaks may produce a faint, intermittent sulfur odor rather than a strong smell. A microseep at a fitting — the type common in older Keller black iron connections — may be noticeable only near the appliance and only intermittently. Any recurring sulfur odor warrants a professional check with a combustible gas detector, even if it does not seem alarming. Do not wait for the smell to get stronger before calling. Call Polly Plumbing at (817) 286-3446 for a non-emergency gas line inspection.

Why do older Keller homes have more gas line issues?

Keller homes built before 1990 have black iron pipe with threaded connections throughout the interior gas distribution system. After 35 to 50 years, the pipe joint compound used to seal those threads can shrink and develop microseeps. The fittings themselves are still structurally sound — the failure is at the sealing compound, not the pipe material. In most cases the repair is disassembly, new sealant, and reassembly of the specific joint rather than pipe replacement. A whole-home gas line inspection is worth considering for any Keller home built before 1985 that has never had one.

Does gas line work in Keller TX require a permit?

Yes. The City of Keller requires a permit for gas line installations and significant alterations. Gas line work must be performed by a licensed Master Plumber. Polly Plumbing handles the permit process as part of every permitted gas line project and coordinates the city inspection. Work done without a permit is a liability for the homeowner and can result in failed home sale inspections or denied insurance claims. Call (817) 286-3446.

Who do I call for a gas emergency in Keller TX — the plumber or the utility?

The utility first. Call Atmos Energy at 1-866-322-8667 or 911 for any situation where you smell gas or suspect an active leak. Atmos responds to gas emergencies at any hour at no charge and will confirm whether the leak is on the service line side (their responsibility) or the house-side interior system (a licensed plumber’s responsibility). After Atmos has assessed the situation and shut off service if necessary, call Polly Plumbing at (817) 286-3446 for the interior repair.

Can Polly Plumbing add a new gas line for an appliance in Keller TX?

Yes. Polly Plumbing installs new gas lines for ranges, dryers, gas grills, outdoor kitchens, fire pits, pool heaters, and other appliances throughout Keller and Tarrant County. New installations require a permit from the City of Keller’s Development Services Department, which Brent obtains as part of the project. The installation is inspected by the city before the appliance is connected and placed in service. Call (817) 286-3446 for a consultation.

Written by Brent Applegate, Licensed Master Plumber, Polly Plumbing. Texas License RMP-42199. Based in Keller, TX. Serving Keller and all of Tarrant County.

Published: May 2026. Last reviewed: May 2026.