Natural gas heats homes, cooks meals, and provides hot water across Wyoming — it's essential infrastructure. But gas is also invisible and odorless, making it one of the few home utilities that can cause serious harm without warning. Understanding how gas lines work and recognizing warning signs can prevent emergencies.
This guide covers what every homeowner in Cody and the Big Horn Basin needs to know about safe gas lines — from recognizing leaks to responding if you smell gas.
How Home Gas Lines Work
Natural gas flows into your home from an underground main line, passes through a meter that measures usage, and then branches into lines serving your furnace, water heater, stove, and other appliances. Each appliance has a shut-off valve near its connection — a critical safety feature you need to be able to locate quickly in an emergency.
The entire system is designed to work safely when maintained properly. But gas lines can corrode, connections can loosen, and appliances can wear out. Regular inspection catches small problems before they become hazardous.
Warning Signs of a Gas Leak
Natural gas is odorless, but gas utility companies add mercaptan — a chemical additive — that creates a distinctive "rotten egg" or sulfur smell. This smell is your first warning sign. But there are other indicators:
- Hissing or whistling from a gas connection or appliance
- Discolored or dying grass in your yard around a buried gas line
- Dead vegetation in a pattern following the path of a buried line
- Bubbles in standing water near gas line connections (if there's moisture)
- Debris or dust blowing from the ground near buried lines
- Unusually high gas bills with no change in usage patterns
- Corrosion or rust visible on metal gas pipes or fittings
- Loose or damaged connections at appliances or where lines enter the wall
Some of these signs — like discolored grass or unusual billing — may indicate a slow leak that doesn't produce the telltale smell. That makes annual professional gas line inspection important, even if you haven't noticed anything wrong.
What to Do if You Smell Gas
If you detect a strong smell of gas inside your home:
- Leave immediately. Do not stop to investigate, check appliances, or look for the source.
- Do not flip light switches, unplug appliances, or use your phone inside the home. Electrical arcs can ignite gas.
- Once outside, call 911 or your gas utility's emergency line (check your utility bill for the number) from a safe location — a neighbor's home or your cell phone away from the building.
- Do not re-enter your home until a professional has inspected it and declared it safe.
Even if the smell fades, the problem hasn't gone away. Have it inspected by a licensed professional before using the home again. A small leak today can worsen — especially in Wyoming winters when pipes contract and connections shift.
This Is a Real Emergency
Gas leaks can cause explosions, carbon monoxide poisoning, and fire. Don't minimize the risk or delay response. If you smell gas, leave and call for help immediately. Gas companies would rather inspect a false alarm than respond to a preventable disaster.
Annual Gas Line Inspections — Why They Matter
Wyoming's freeze-thaw cycle is hard on gas lines. Underground lines can shift with ground movement. Connections corrode. Regulators and safety valves wear out. Many gas leaks produce no smell — they're slow enough to escape detection, but fast enough to waste money and increase risk over time.
Professional inspection uses specialized equipment: electronic leak detectors can sense gas concentrations too small to smell, and pressure gauges can identify slow leaks in buried lines. A technician walks the entire system — from the meter to every appliance connection — to look for corrosion, loose fittings, cracked insulation, and improper installation.
Annual inspection is especially important if:
- Your home is more than 30 years old and hasn't been inspected recently
- You've had any gas-related work done and want to verify it was installed safely
- You notice dying grass in a pattern following an underground line
- You smell gas occasionally but can't pinpoint the source
- Your appliances are aging (furnace over 15 years, water heater over 10 years)
Carbon Monoxide Detectors — The Secondary Safety Layer
Gas appliances in good condition burn gas cleanly and vent combustion byproducts outside through a flue or chimney. But a faulty appliance, blocked vent, or improper installation can allow carbon monoxide — a colorless, odorless, toxic gas — to build up inside your home.
Install carbon monoxide detectors:
- In bedrooms and common living spaces
- Within 10-15 feet of any gas appliance
- At least 10 feet away from cooking appliances (which produce small amounts of CO during normal operation)
- One per level of your home, minimum
Test detectors monthly and replace batteries twice a year (when you change clocks for daylight saving time). Replace the entire unit every 5-7 years, as sensors degrade.
Symptoms of carbon monoxide poisoning: headache, dizziness, nausea, chest pain, confusion. If you suspect CO poisoning, leave the home immediately and call 911.
Gas Line Installation & Repair — Always Hire a Licensed Professional
Many homeowners think gas line work is straightforward — just like plumbing or electrical. It's not. Gas lines require specific fittings, pressure regulators, venting requirements, and permits. Improper installation can create slow leaks, improper venting, or conditions that fail suddenly.
Wyoming law requires licensed, insured contractors to install, modify, or repair gas lines. We've seen dangerous DIY attempts: incorrect fittings that slowly corrode, lines run without proper support that kink and restrict flow, and connections made without safety shutoff valves. Fixing these mistakes costs thousands.
When you need gas work done — connecting a new grill, installing an outdoor heater, relocating a line — hire a professional. Our team handles every aspect: proper sizing, correct fittings, pressure regulation, safety testing, and permitting.
Quick Reference: What to Do in Gas Emergencies
Smell gas: Leave home, don't use electrical switches, call 911 from outside.
Suspect carbon monoxide: Leave home, call 911, mention CO poisoning concern.
Hear hissing at a gas line or fitting: Leave home or close the doors to that room, call 911 or your gas utility immediately.
Find dead grass in a line pattern: Call your gas utility or a licensed plumber for inspection — may indicate an underground leak.
Gas emergencies are always urgent. Wrangler Plumbing & Heating responds 24/7 to gas-related emergencies across the Big Horn Basin. If something feels wrong, don't wait until business hours — call (307) 587-3713 any time, day or night.