How to test for gas leak in house?

Author: Keegan Welch  |  Last update: Saturday, July 12, 2025

Here are five ways you can check for gas leaks in your house:
  1. Check for a Sulfur or Rotten Egg Smell. ...
  2. Listen for a Whistling or Hissing Noise. ...
  3. Check the Stove or Range Top. ...
  4. Use a Gas Leak Detector. ...
  5. Conduct a Soapy Water Test.

How to detect a gas leak in your house?

If you detect any of the following signs of a natural gas leak in your house or think you have been exposed, contact 911 immediately.
  1. The smell of rotten eggs. In its natural state, natural gas is odorless and colorless. ...
  2. Hissing sounds. ...
  3. Air bubbles outside your home. ...
  4. Dead or dying plants. ...
  5. Higher-than-normal gas usage.

What are the symptoms of a small gas leak?

Common symptoms include:
  • Breathing difficulties.
  • Dizziness.
  • Fatigue or drowsiness.
  • Feeling lightheaded.
  • Flu-like symptoms.
  • Headaches.
  • Irritation to the eyes and throat.
  • Mood changes, including depression.

Will a carbon monoxide detector detect a gas leak?

No, carbon monoxide (CO) alarms cannot detect natural gas leaks. They are designed to detect the presence of carbon monoxide, a poisonous gas formed during incomplete combustion of fuels like oil, gas, propane, and wood.

How do plumbers test for gas leaks?

Common leak-test methods are pressure and vacuum decay, tracer gas detectors, and a bubble soap leak detector. Trades and homeowners alike can use a bubble soap leak detector to check piping systems for leaks.

How to detect a gas leak

How much does a gas line leak test cost?

If you suspect a gas leak, a plumber will first conduct a pressure test. This is a relatively simple process that should cost $75 to $150 and take around 30 minutes to complete. However, some parts of the country will require a lengthier gas line pressure test that will take more than 24 hours and cost up to $500.

Is there a device that can detect gas leaks?

The gas leak alarm sensor is like a superhero that can detect butane, methane, and any odd smells lurking around. And the best part? It talks! It's got voice prompt, so it can be like, "Hey, watch out!

Why does my house smell like gas but no leak?

If there is a gas smell but no leaks, it could be the lingering propane odor due to poor ventilation or it coming from your neighbor. The dirty sewage system, contaminated well, or rotten garbage (like veggies, dead animals, residual foods, etc.) might also be the source of the smell.

What type of detector detects natural gas?

Types of natural gas detectors

Some manufacturers of carbon monoxide detectors offer combination or 3-in-1 detectors to alert when carbon monoxide or an explosive gas such as natural gas or propane is detected.

How to tell if a stove is leaking gas?

What To Look For
  1. The gas flames on your stove are yellow, not blue.
  2. You can smell gas near your stove, even if it's turned off.
  3. If you touch the oven door, it's hot to the touch.
  4. You can hear a hissing noise near your stove.

Can you stay in a house with a gas leak?

Here's what you should DO if you smell gas: DO leave the home, building, or area of the suspected leak. Get to a safe area as quickly as possible. After leaving your home, DO call the 24-hour emergency number for Peoples at 1-800-400-4271, or call your local emergency response number.

Can a slow natural gas leak make you sick?

Can a slow gas leak make you sick? Yes, a slow gas leak can cause chronic health conditions, including respiratory problems and lethargy or fatigue.

Would a gas leak smell come and go?

Natural gas leaks are particularly likely to cause smells in small, enclosed areas where gas can build up. If the leak is outside, the smell may seem to come and go as the breeze blows it away. The other big sign to look out for is a strange noise.

How do you find a gas leak without a detector?

An odor of rotten eggs near an appliance is likely associated with natural gas. Look around the walls for stains; if you notice any discoloration, it could signify a gas leak. You can feel the area for any puffiness, which may indicate excessive heat, which is another indication of a gas leak.

How long does it take for a gas leak to harm you?

Severe leaks can cause this problem in just five minutes. The EPA states that exposure to concentrations of nine ppm or more for eight hours is enough to produce harmful health effects for at-risk individuals. Exit the property and call 911 if you suspect your home has a gas leak.

Can the fire department check for a gas leak?

“Call for 911 and have a fire department respond. We have gas monitors so we can get there and try to detect where it's coming from and where most of it is.” Another way to prepare is to have your gas pipes and systems checked regularly, especially if you own an older home.

How do I know if I have a gas leak?

In addition to having a distinct smell, natural gas leaks are often visual, causing bubbling water, blowing dirt or dead vegetation. You may also see sinkholes or exposed pipe. It's also possible to hear a hissing sound near a natural gas line or meter.

Where to place a gas leak detector?

Sensors should be located near the floor for gases or vapors three or four times heavier than air. They should be installed near the ceiling or roof to detect lighter-than-air gases.

Will a carbon monoxide detector detect gas leak?

Answer: While a carbon monoxide detector is helpful to prevent carbon monoxide poisoning, you cannot rely on a carbon monoxide detector to detect a gas leak. A carbon monoxide detector will sense carbon monoxide, not raw fuel or gas fumes.

What can be mistaken for a gas leak?

Although Alliant Energy adds a distinctive odor to natural gas as a safety precaution to assist in the detection of leaks, your sense of smell might not be enough to detect a leak. Strong smells in the area, like cooking or chemical odors, can mask the smell of natural gas.

Does smelling gas always mean a leak?

In some instances, the smell of gas may be present naturally. However, leaks can occur, and we want to make sure they are resolved as quickly as possible. Natural gas is odorless, but an additive called mercaptan is included to alert people of leaks.

What smell can be mistaken for gas in your house?

Mercaptan gives off a strong sulphur-like smell which can be mistaken for the smell of rotten eggs. It's often this smell that is the early warning of any sort of gas leak and you should take the appropriate measures to ensure the safety of yourself and others around you.

How much is gas leak detection?

At 1300 FINDLEAK, our gas and water leak detection cost Australia wide starts from $168 including GST. Prices may vary depending on your location, and whether it is a domestic or commercial job.

How do you suspect a gas leak?

Open your windows for better ventilation. Check that stove burners, naked flames, and pilot lights are off. Finally, turn off your electricity at the fuse box. From outside the house, call your local licensed plumber or gas fitter.

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