Meyer's Plumbing — Service Guide
Gas Leak Detection & Repair
A guide to understanding natural gas leaks in residential plumbing systems — the warning signs, how professional detection works, and what repair involves.
Gas Leaks in Residential Plumbing
Natural gas is delivered to most homes through a network of supply lines that run from the street meter to appliances — furnaces, water heaters, stoves, dryers, and fireplaces. These lines are typically steel or flexible corrugated stainless steel tubing (CSST), and they are designed to last for decades under normal conditions.
Gas leaks occur when a fitting loosens, a pipe corrodes, a line is damaged, or a connection at an appliance fails. Because natural gas is odorless in its natural state, utility companies add mercaptan — a sulfur compound — to give it the distinctive rotten-egg smell that makes leaks detectable. Any suspected gas leak should be treated as an emergency.
Warning Signs of a Gas Leak
Recognizing the signs of a gas leak and knowing how to respond can prevent a dangerous situation from becoming a catastrophic one.
Rotten Egg or Sulfur Smell
The most recognizable sign of a natural gas leak is the distinctive rotten-egg odor of mercaptan. If you smell this inside your home or near your gas meter, take it seriously immediately.
Hissing Sound Near Gas Lines or Appliances
A hissing or whistling sound near a gas line, meter, or appliance can indicate gas escaping under pressure. This is particularly concerning near the meter or at a flexible connector behind an appliance.
Dead or Dying Vegetation
An underground gas line leak can kill grass and plants in a localized area above the pipe. A patch of dead vegetation in an otherwise healthy yard — especially in a line from the meter to the house — warrants investigation.
Bubbling in Standing Water
Gas escaping from an underground line can cause bubbling in puddles, wet soil, or standing water above the pipe. This is a reliable visual indicator of an outdoor gas line leak.
Physical Symptoms
Exposure to natural gas in an enclosed space can cause headaches, dizziness, nausea, and fatigue. If multiple people in the home experience these symptoms simultaneously, a gas leak is a possible cause.
Appliances Not Lighting or Burning Irregularly
A gas appliance that won't light, produces an orange or yellow flame instead of blue, or has a pilot light that keeps going out may have a supply issue related to a leak or pressure problem in the gas line.
What to Do If You Suspect a Gas Leak
If you smell gas or suspect a leak, the priority is to get people out safely and prevent ignition — not to investigate.
Don't Use Electrical Switches or Open Flames
Do not turn lights on or off, use a phone inside the building, or create any spark or flame. Natural gas mixed with air is flammable within a specific concentration range.
Leave the Building Immediately
Get everyone out of the building quickly. Leave doors open as you exit to allow ventilation, but don't take time to gather belongings.
Call from Outside
Once you're safely away from the building, call your gas utility's emergency line and 911. Do not re-enter the building until it has been cleared by the utility or emergency responders.
Call a Licensed Plumber for Repair
After the utility has confirmed the building is safe to re-enter, a licensed plumber performs the pressure testing, leak locating, and repair work needed to restore the gas system safely.
How Gas Leaks Are Detected and Repaired
Professional gas leak detection uses pressure testing and specialized equipment to locate leaks precisely before any repair work begins.
Pressure Testing
The gas system is isolated and pressurized with air or an inert gas. A drop in pressure over a set period confirms a leak exists somewhere in the system. This test is also used after repairs to confirm the system holds pressure before gas is restored.
Electronic Gas Detection
A combustible gas detector is used to trace the leak to its source. The instrument measures gas concentration in the air and guides the plumber to the highest concentration point — the location of the leak.
Repair and Retesting
Once the leak is located, the damaged fitting, connector, or pipe section is repaired or replaced. The system is then pressure-tested again to confirm the repair is sound before gas service is restored.
Common Questions About Gas Leak Detection
Need Gas Line Testing or Repair?
Meyer's Plumbing performs gas line pressure testing, leak locating, and repair for residential properties in Fort Worth and the DFW area. Call for a prompt, professional assessment.