Gas Leak Emergency

Treat any of these as leave-now signals:

• Sulfur or rotten-egg odor. Utilities odorize natural gas precisely so your nose finds it before anything else does. Faint or strong, indoors or at the meter, the response is the same.
• Hissing near a line or appliance. Escaping gas is audible at even modest pressure. A hiss at a flex connector, valve or the meter set deserves the full protocol, not a sniff test.
• Dead vegetation over a buried run. A brown stripe across an otherwise green yard can mark an underground leak long before odor reaches the surface.
• Appliances misbehaving together. Pilots dropping out across the house, burners starving, a meter spinning with everything off: these are system-level signs, not appliance quirks.

This page covers what happens after the utility makes the scene safe: how the leak is located, what the repair involves, and how the system is proven tight before gas flows again. The piping work itself lives on the gas line repair page; this is the emergency playbook wrapped around it.

Where gas systems actually fail:

• Aging fittings and unions. Threaded joints from decades past dry out and weep, the classic source behind faint, persistent odor.
• Flexible connectors past their era. Old brass flex lines behind ranges and dryers have known failure history; movement and time finish them.
• Physical strain. A shifted appliance, a nail from a renovation, settling that pulls on rigid pipe: gas lines fail at whatever moves them.
• Corrosion on buried or exposed runs. Soil chemistry outside and condensation indoors both eat unprotected steel over the years.

After the scene is safe, the plumbing side goes like this:

• Isolate and confirm. With the meter valve closed, a pressure-drop test on the house side confirms whether the system holds. A holding system points to an appliance; a dropping one means the piping itself.
• Locate the joint. Electronic combustible-gas detectors and bubble solution walk the line joint by joint until the specific fitting or section is named. No guesswork repairs.
• Repair the section. The emergency's job is sequencing: the failed section is isolated and made safe first, and the actual pipework follows the gas line repair page's craft. This page only insists it happens before gas returns.
• Prove it tight. Restoration is a three-party handshake: the repair holds its test, the utility turns the meter back on, and every pilot in the house is relit in order. Until all three happen, the emergency is not over, whatever the nose says.

• Gas Line Repair
• Emergency Plumbing