Can A Water Heater Leak Gas: Signs and Preventions

Can A Water Heater Leak Gas: Signs and Preventions

Gas water heaters require either natural or liquid propane gas to operate fully. While such gases can power a boiler, they can also cause more problems over time. Gas parts can be brittle, especially in an environment incompatible with how gas usually works. If you don’t maintain your gas water heater properly or if you have chemicals or heating appliances nearby, many problems can occur over time.

One of the most common downsides to gas water heaters is that they leak gas. This leak occurs when the steam gas line breaks. It can also occur if the water heater is improperly installed or maintained. If your gas water heater is leaking gas, here are some warning signs, repair options, and common reasons to investigate.

Signs That Your Gas Is Leaking.

The Smell Of Rotten Eggs.

If the gas water heater smells like rotten eggs or sulfur, this is a clear sign of a gas leak. Gas is colorless, so it can be hard to find if you’re looking for it. As a safety precaution, the companies added a chemical that makes the air smell strongly of rotten eggs. If you smell something like this, it’s time to check your gas water heater.

The Hissing Noise.

Gas leaks can be detected by smell and breath sounds. If your gas water heater makes a squeaking or buzzing noise when the air moves, this is a clear sign that your system is letting the gas out for free. The rotten egg smell and screeching sound are usually caused by broken air lines and parts. When this sound is heard, professionals should take safety precautions before calling.

Dead Plants.

Another sign that a gas water heater is leaking gas is the death of plants near the water heater. It usually means a gas leak near brown, dead, or dying plants. Gas water heaters can also leak if water accumulates in different areas of the heater.


If your gas water heater is leaking gas, you can tell with a bubble or soap test. Mix dish soap and water and do the test. Then, soak or soak a cloth rug in the soap-and-water mixture and wipe down water heaters, gas lines, and other areas where air can leak. If bubbles are present in the washed areas, it indicates air is leaking from those areas is coming.

If you notice a gas leak, open windows and doors and call for professional assistance.

Also, Read: Can A Bad Hot Water Heater Affect Electric Bill

Reasons For Gas Leakage.

The Drain Valve.

A broken pipe is one of the most common causes of these water heater leaks. If water appears to be leaking from the valve, there must be some Gas leaking, and the valve should be tightened until the leak stops or until the leak stops. If you are unsure how to do this, call a plumber immediately.


The water heater puts more pressure than it should, causing it to leak. These can occur if the water temperature is too high or water comes in at high pressure outside the tank.

Cracks in The Tank.

Many water heaters now have glass tanks. Many naturally occurring minerals in the water can harden over time and form deposits in the tank. This breaks some of the glass coating and leaks the water heater. Also, once the water starts to warm up, it gets worse. If the crystals in the heater are expanded, they can cause more cracks.

How to Fix a Leaking Gas Water Heater?

Follow these steps to safely turn off the gas supply to the hot water heater and clean the heater Gas leak:

  1. Clean the area where the vapor deposits.
  2. Make sure you have clear access to the gas pipe and shutoff.
  3. Locate the air gas connection on the water heater. Remember that the water heater hose can go anywhere: above, beside, or behind the heater.
  4. Close the gas valve. When you reach the pipe, spin the handle counterclockwise until it stops. The tubing is unplugged once the hand is no longer in the way.
  5. Close the main gas valve. A fresh wire with a polymer coating should be placed instead. When everything is in place, the depth of new gas lines installed on or above ground should not exceed two feet.
  6. Open all the doors and windows to let the stale air in.
  7. Check for the presence of a gas odor.

If you still smell gas, switch off the water heater twice. In that scenario, turn off the gas at the meter and immediately contact the gas provider.

Is There A Risk If Your Water Heater Has A Minor Gas Leak?

Carbon monoxide is abundant in the environment and can be hazardous in large doses. Gas Leaks in water heaters can cause severe symptoms such as:

  • Headaches, dizziness, and drowsiness.
  • Ear discomfort and a burning sensation in the eyes.
  • Blood dripping from the nose.
  • Heart palpitations and soreness in the chest.
  • Rapid skin browning.
  • Illness and appetite loss.

Many other symptoms have been connected to water heater exposure to hazardous gases. In short, it can be fatal; thus, making sure the water heater is airtight is vital. In the event of a gas leak, these modest symptoms or causes could swiftly escalate, making immediate action impossible.


Finally, while water heater gas leaks are dangerous, they may be avoided with proper maintenance. To keep your water heater running as long as possible, you must be aware of the warning indications of a gas leak, take preventative steps, and address any problems as soon as they arise. Your dedication to regular and secure maintenance goes a long way toward ensuring your family’s safety and avoiding gas leaks.


Is it possible for a gas leak to occur in a water heater?

If the gas leak is discovered to be coming from the water heater, the flexible gas line leading to the water heater may be the source of the problem. Although it is not technically difficult to replace, Kotz recommends that the repair be performed by a qualified plumber, owing to the dangers of dealing with gas lines.

Is it common to smell gas coming from a water heater?

Gas leaks, no matter how big or tiny, must be fixed. Leaks, if not repaired properly, can cause health issues and increase the risk of fires linked with larger leaks. There could be a leak if you smell gas near the water heater.

What should you do if your gas water heater leaks?

Turn off the gas at the authorized gas shut-off valve on the gas line leading to the water heater if you suspect a gas leak.

Can I use my water heater even if it is leaking?

You do not have to stop your normal activities if you fear your water heater is leaking. While you wait for a plumbing professional, you can normally continue to use hot water.


About Author

Mobeen Shahid

Mobeen Shahid

Mobeen Shahid is a Mechanical Engineer with two years of experience in the HVAC industry. His passion is analyzing HVAC issues, and he works relentlessly to devise customized solutions. He has been in the industry long enough to know the ins and outs and ensures that areas are optimally heated, cooled, and ventilated.

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