Austin's Best Plumbing

Tankless Water Heaters: What To Do If You Smell Gas?


Tankless water heater is an affordable and super performing solution for hot water. Though initially, it’s the cost is high, it serves awesomely. Regular maintenance is mandatory for the smooth performance of tankless water heaters. Gas tankless water heaters perform better than an electric one. You should have a clear idea about What to do if you smell gas. Let’s dig out.

What to do if you smell gas

If you detect gas leakage, you should act instantly. Early find out of natural gas leakage will give you some valuable time to save you and your family member’s lives and property.

Let’s see what you should do or don’t after identify gas leakage:

Do not light any appliances

Products like gasoline, thinner, adhesive, solvent, paint thinner, kerosene produce Flammable vapor. Flammable vapor is invisible and lighter than air. It can travel rooms of your home to a water heater or any other appliances by the air current.

Under this kind Of situation, if you try to light any appliances, there could be an explosion or catch fire which may cause serious damage like property destruction, severe burn, or even death.

Do not touch electrical switches

Flammable vapor or liquids are ready to ignite. Just require a spark of fire. It may come from the lighting of any appliances or any electrical switches. 

Do not touch electrical switches Austin's Best Plumbing

So, when you smell gas, never touch electrical switches. Those may produce a tiny spark to catch fire or for an explosion. As a result, serious damage like property and human life would be done.

Shut off the gas supply

Some argue that one should shut off the gas supply before evaluating the home if you don’t risk yourself or others. After the evacuation of all residents of your home, shut off the gas supply, as less leakage means less accumulation of gas which is comparatively less chance to catch fire or explosion.

Open door and window

For minor gas leakage, you should open windows and doors of your home to ventilate air. Flowing gas can escape.

Do not use Electronic Appliance

Do not use phone Austin's Best Plumbing

You should avoid using any type of electric appliances like garage door openers or phone in your building. Phone connection or network may cause further reasons to catch fire or explosion.

Evacuate the area

Evacute the area Austin's Best Plumbing

When you smell, hear, or feel a gas leak. You should not stay in the building or area. You should evacuate the building or area immediately.

Call gas supplier 

Immediately Call the local gas company from your neighbor’s phone. Follow gas providers’ instructions properly. If you can’t reach your gas supplier, call the fire department.


Installation and services must be performed by a licensed plumber, qualified installer, service agency, or gas supplier.

Use gas detector

Not every time you will be able to smell gas odor. You may have declined sense of smell, olfactory fatigue (temporary inability to distinguish particular odor lengthy  exposure to that airborne compound.).

Gas odor would be being masked or hidden by other odor like cooking, damp or chemical odor and for this reason you may not smell gas.

If natural gas leakage happen inside underground, then surrounding soil causes odor fade. In that situation gas may not detect by smell. Odor Fade caused by oxidation , absorption or any combination of thereof.

 To avoid this situation and detect any kind of natural gas leakage you may use a gas detector.

People also asked

How do you know if you have a gas leak in your home?


How do I know if I smell gas?

Ans: You may detect a gas leak by using your three organs like eyes, nose, and ears. Sometimes you can smell sulphur or something like rotten eggs. Those from a gas leak. You may also notice a damaged gas connection or something unusual like white clouds, blowing dust, or bubbles in standing water. At last, you can find out a leakage by hearing a hissing or whistling sound adjacent to a gas line. Dead or discolored vegetation is another way to look up a gas leakage.

Will a carbon monoxide detector detect a gas leak?

Ans: A carbon monoxide detector designed to detect elevated levels of carbon monoxide and alert not to detect gas. 

Is a small gas leak dangerous? 

Ans: Definitely yes. A small gas leak is also dangerous, even deadly. Natural gas is flammable. That’s why a small gas leak would be the cause of catching fire or explosion which might invite property damage, severe injury, or death. 

Is there a device to detect gas leaks?

Electronic gas leak detector Austin's Best Plumbing

Ans: Yes. The name of that kind of device is Home-flex gas leak director. This device is designed to detect even small gas leaks. It’s a built-in microprocessor that can easily detect natural gas, liquid propane, and bad methane gases. It has two lights; Red and yellow also which are to indicate the amount of gas detected. This device has an audio option that makes a sound when it detects gas.

Can a gas leak make you ill?

Ans: Yes, a gas leak can make you ill. The odor of the gas would be the reason. The smell of Sulphur or something rotten makes you feel sick. The symptoms of these ailments are feeling lightheaded.

How much does it cost to fix a gas leak?

Ans: the cost of a gas leak may vary. The Repairing or replacing a gas leak to a single appliance cost would be between $150 and $650. This cost includes labor and materials.

The cost of Replacing a gas line to your house would be between $3000 to $7000. Cost includes labor and materials. 

Do you call 911 if you smell gas?

Ans: Natural gas is a safe and reliable source of energy. If you smell gas in your home or other places, you can obviously call 911 for assistance. By calling 911 you can avoid probable danger for your property, even life.

Can leaking gas kill you?

Ans: Yes. Gas can kill you in two ways.

  1. By Igniting or explosion
  2. By suffocating

When a room is accumulated with gas, there would be a chance to ignite or catch fire or even explosion. These incidents may cause severe injury or even death. On the other way, gas may not ignite or explode but still have the ability to kill you by suffocating. Carbon Monoxide is also can kill by preventing your body from oxygen absorption.

Does a plumber fix a gas leak?

Ans: Yes, a licensed plumber can fix a gas leak. When you detect a gas leak, you should take measures to fix the leak. A natural gas leak seeps not only carbon monoxide continuously but also accumulates flammable materials to ignite fire or explosion.

How long does it take for a gas leak to clear?

Ans: Typically, it requires a few hours to dissipate the leakage gas. If not, just call the local gas company and report the problem. If residents of your home suffer nausea, dizziness, headache or flu-like symptom then call 911 without wasting a second, as these are signs of carbon monoxide poisoning.


In the USA about 55% home uses natural gas as primary energy. It is also used as a transportation fuel for cooling and power generation. So, gas leaks may happen at any time anywhere. If you discover any leak, just contact autin’s best plumbing company plumberson. We will handle the issue with the perfect tool within a very short span of time.

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