Gas Leak Detection in Dallas & Plano, TX: How We Find Natural Gas Leaks

Written by Steven Shipler, Texas Licensed Master Plumber, Responsible Master Plumber (RMP), MBA. Texas Master Plumber License #45825.

If you smell natural gas, have failed a gas pressure test, have had your gas meter removed, or suspect a leaking gas line somewhere between the meter and an appliance, finding the actual source of the leak is the first step toward making the system safe again.

Lone Star Leak Locators provides professional gas leak detection in Dallas and Plano, Texas using systematic pressure testing, electronic gas detection, system isolation, and professional diagnostic procedures designed to narrow down where a gas piping system is losing pressure.

We do not believe in randomly opening walls, cutting floors, replacing entire gas systems, or excavating a yard before the problem has been properly investigated.

What Does Gas Leak Detection Actually Mean?

Gas leak detection is the process of determining whether a fuel-gas piping system is leaking and then narrowing the problem to a specific branch, fitting, valve, appliance connection, underground service line, or section of piping.

There is an important difference between proving that a system leaks and finding exactly where the leak is located.

A pressure test may confirm that the system is losing pressure.

The next step is locating the source.

That can require isolating different sections of the gas piping, checking valves and appliance connections, using electronic combustible-gas detection equipment, evaluating accessible joints, and performing additional pressure testing.

Common Signs of a Natural Gas Leak

• Rotten-egg or sulfur-like odor
• Hissing or whistling near gas piping
• Gas service unexpectedly shut off
• Failed gas pressure test
• Utility company identifies a possible leak
• Gas meter will not be released or reconnected
• Gas odor near a furnace, water heater, fireplace, or range
• Gas odor near the meter or yard service
• Recent foundation movement
• Recent remodeling or gas piping modifications
• Old threaded black steel gas piping
• Corrosion on exterior or underground piping
• Recent excavation near a gas line

How We Find a Gas Leak

The exact procedure depends on the property and why the gas system is being tested, but a professional investigation normally works from the broad problem toward the specific problem.

Three Important Tools Used During Gas Leak Diagnostics

1. Electronic Combustible-Gas Detector

Electronic gas detection equipment can help identify combustible-gas concentrations around accessible fittings, valves, appliance connections, regulators, and piping.

2. Gas Pressure Test Gauge or Manometer

Pressure-testing equipment is used to determine whether the piping system can maintain pressure. This is especially important after a gas leak repair or when a municipality requires a witnessed gas test before service can be restored.

3. Approved Leak-Detection Solution

Accessible joints and fittings may be checked with an appropriate noncorrosive leak-detection solution when conditions permit. Formation of bubbles can help identify leakage at a particular accessible connection.

Gas Leak Detection in Dallas, Texas

Dallas has specific requirements surrounding gas-system testing and restoration of gas service.

The City of Dallas currently publishes gas-test guidelines referencing the 2021 International Fuel Gas Code and Dallas amendments.

For a Dallas gas test requiring city inspection, the city’s published guideline calls for the fuel-gas piping system to be tested using an approved diaphragm test gauge at 3 psig for a minimum of 15 minutes while witnessed by a Dallas plumbing inspector.

The city may also require a plumbing permit and gas inspection when fuel-gas piping has been repaired, replaced, changed, or when gas service must be formally released for reconnection.

That means gas leak locating in Dallas often involves more than simply finding a leaking threaded fitting. The complete process can involve:

• Leak diagnosis
• Pressure testing
• Repair planning
• Plumbing permit
• City inspection
• Gas test
• Gas release
• Utility reconnection

Dallas Service Area Map

Gas Leak Detection in Plano, Texas

Plano homeowners also frequently need gas-system testing after a suspected leak, appliance change, gas piping repair, remodeling project, utility interruption, or failed pressure test.

Plano Building Inspections handles building, plumbing, and related inspection requirements. The City of Plano currently identifies its 2024 construction codes as effective August 1. Because permit and inspection requirements can vary depending on exactly what part of the gas system is being repaired, the applicable requirements should be confirmed for the individual project.

Lone Star Leak Locators can perform the diagnostic work needed to determine whether a gas system is leaking and help identify the likely location before the repair scope is finalized.

Plano Service Area Map

Gas Leak Detection in Richardson and North Dallas

We also perform leak-detection work throughout nearby North Dallas communities, including Richardson and surrounding areas.

The same principle applies regardless of city: determine whether the gas piping system is actually leaking, isolate the problem as much as practical, identify the repair area, and then follow the applicable municipal permit and inspection requirements before the system is returned to service.

Finding Underground Gas Leaks

Underground gas piping presents a different challenge because the line cannot be visually inspected without excavation.

Depending on the system configuration, the diagnostic process may involve isolating the underground portion from interior piping and determining whether that section holds pressure.

If an underground section is proven to leak, the next question becomes whether the line should be spot repaired or replaced.

Excavating blindly without first establishing which portion of the system is leaking can create unnecessary labor and property damage.

Finding Gas Leaks Under or Around a Foundation

Gas lines can pass through difficult areas around foundations, crawl spaces, walls, attics, fireplaces, kitchens, mechanical rooms, and exterior walls.

Foundation movement can also place stress on piping and fittings.

When the leak cannot be seen directly, pressure testing and system isolation become extremely important.

Why System Isolation Matters

Imagine a home with gas serving:

• Two water heaters
• A gas furnace
• A cooktop
• A fireplace
• A clothes dryer
• An outdoor grill

If the entire system fails a pressure test, simply knowing that pressure dropped does not tell you which branch caused the failure.

By narrowing the system into smaller sections, a technician can often determine whether the problem is associated with an appliance branch, exterior line, yard service, or another part of the system.

Gas Leak Detection vs. Gas Leak Repair

These are two different services.

Gas leak detection determines whether a leak exists and works to identify where it is located.

Gas leak repair corrects the actual defect.

Sometimes the same plumbing contractor performs both.

In other situations, the customer wants an independent diagnostic report first so repair contractors can bid from a better-defined scope.

That is one reason the Master Plumber Report is valuable.

Why the Master Plumber Report Matters

A gas-system diagnosis can affect a major repair decision.

You may be deciding whether to:

• Repair one threaded fitting
• Replace an appliance shutoff valve
• Replace a branch line
• Replace an underground yard service
• Repipe a portion of the house
• Replace the entire gas piping system

Those are very different scopes of work.

Our goal is to document the evidence before the customer commits to unnecessary work.

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Frequently Asked Questions About Gas Leak Detection