If you smell rotten eggs in your home, treat it as a possible gas leak. Open doors and windows, get everyone outside, call your gas company so they can shut off the gas supply, and then call a plumber for gas leak detection. Do not wait to see if the smell goes away.

Gas is a convenient fuel for many household appliances, but a leak is never something to leave until later. This guide covers the warning signs, the right order of steps, and what happens after the immediate danger is handled.

Why Gas Smells Like Rotten Eggs

Natural gas on its own has no smell. Gas companies add a sulfur odor to it on purpose so that people can notice a leak. That odor is the familiar rotten egg smell.

This is why your nose is your first line of defense. If you catch that smell indoors, near an appliance, or around a gas line outside, take it seriously even if it seems faint.

The Three Main Warning Signs

Watch and listen for these signs:

• A rotten egg or sulfur smell. This is the most common sign, and it is there by design.
• A hissing sound. Gas escaping from a line under pressure can make a hissing or whistling noise near a pipe, fitting or appliance connection.
• Dead or dying plants over a gas line. If a strip of your yard is browning for no obvious reason, and a gas line runs underneath, the line may be leaking underground.

Any one of these signs is reason enough to act. You do not need all three.

What to Do Right Away

The order matters. Follow these steps:

1. Open doors and windows. Let fresh air in to help the gas disperse.
2. Get everyone outside. Move your family and pets out of the house.
3. Call the gas company. They can turn off the gas supply to your home.
4. Call Allens Plumbing. Once the supply is handled, we can come in and perform leak detection to find the source.

A few things to avoid while you are getting out: do not try to track down the leak yourself, and do not stay inside to investigate. Your only job in the moment is getting people to fresh air and making the calls.

Why Professional Leak Detection Matters

Shutting off the gas stops the immediate danger, but it does not fix anything. The leak is still there. Before the gas can be safely turned back on, someone needs to find exactly where it is coming from and repair it.

That source is not always obvious. A leak might be at an appliance connection, at a fitting along an indoor line, or somewhere along a buried line in the yard. Finding it takes the right approach and experience with gas piping.

Allens Plumbing has provided gas leak detection to homes and businesses on Oahu and Maui since 1982. Our goal is to find the source of the problem and repair it, not just address the surface symptoms.

Where Gas Leaks Tend to Happen

Leaks can show up anywhere gas is carried or used. Common places to pay attention to include:

• Appliance connections. Gas ranges, dryers and gas water heaters all connect to the supply line, and those connections can loosen or wear.
• Indoor gas piping. Fittings and joints along the line are potential weak points.
• Outdoor and buried lines. Lines that run outside or underground are exposed to the elements. In coastal Hawaii, salt air is hard on exposed metal.

If you have a gas line serving a grill, a water heater or another outdoor appliance, it is worth taking a look at the exposed sections now and then. Rust, damage, or anything that looks out of place deserves a professional check. Our gas line service page covers repair and installation.

Gas Water Heaters Deserve Extra Attention

Many homes use a gas water heater, and it is one of the most common gas appliances in the house. If you smell gas near your water heater, follow the same steps above: get outside, call the gas company, and call a plumber.

Once the leak has been found and repaired, it is also a good time to have the water heater itself looked at. Allens Plumbing services water heaters, and you can read more on our water heater page.

Gas Leaks Are an Emergency

A suspected gas leak is not the kind of problem to put on a list for next week. If it happens after hours, call anyway. Allens Plumbing offers 24/7 emergency response, and you can learn more on our emergency plumbing page.

Serving Homes Across Oahu and Maui

Whether your home is in Honolulu, Pearl City, Kaneohe or Kapolei on Oahu, or in Kahului, Wailea-Makena, Kula or Lahaina on Maui, the steps are the same. Get to fresh air, call the gas company, and then call us to find and fix the leak.

You will know the cost of the work before we begin. There are no hidden fees.

Quick Recap

• Natural gas has a rotten egg smell added on purpose so you can notice a leak.
• A hissing sound or dying plants over a buried gas line are also warning signs.
• Open doors and windows, get everyone outside, and call the gas company first.
• Then call a plumber to find the source of the leak and repair it.
• Never try to locate a gas leak yourself.

If you suspect a gas leak, do not wait. Once everyone is safely outside and the gas company has been called, call Allens Plumbing at 808-599-5511 on Oahu or 808-877-6370 on Maui. For non-urgent gas line questions, you can also request an appointment online.