Gas Leak or Water Leak? How to Tell the Difference and Act Fast
As a homeowner, dealing with leaks is never fun—but when the leak involves gas instead of water, it’s a whole different level of urgency. Knowing the difference between a gas leak and a water leak can protect your home, your health, and even your life. Let’s break down how to identify each type of leak, what to do when you suspect one, and when to call for professional help.
Gas Leak vs. Water Leak: Key Differences
Both gas leaks and water leaks can cause serious damage, but they present in very different ways. Here’s how to tell which one you’re dealing with:
Signs of a Gas Leak
- Rotten Egg Smell – Utility companies add a sulfur-like odor to natural gas to make leaks easier to detect.
- Hissing or Whistling Sounds – Gas leaks from pipes or appliances may produce a faint hissing noise.
- Dead or Dying Plants – Outdoor gas leaks can kill grass and plants above the leak.
- Physical Symptoms – Dizziness, headaches, nausea, or difficulty breathing can be signs of gas exposure.
- Bubbles in Water Puddles – If you see bubbles forming in standing water outside, a gas leak may be escaping from an underground pipe.
Signs of a Water Leak
- Visible Water Damage – Stains on ceilings or walls, puddles near appliances, or soft spots on floors indicate a leak.
- Increased Water Bill – A sudden spike in your water bill could mean a hidden leak.
- Mold or Mildew Growth – Excess moisture from a leak can lead to mold growth and musty smells.
- Sounds of Running Water – If you hear dripping or water running when no fixtures are in use, a hidden pipe may be leaking.
- Low Water Pressure – A decrease in water pressure can indicate a break or blockage in your plumbing system.
What to Do If You Suspect a Leak
If You Suspect a Gas Leak:
- Evacuate Immediately – Leave the house and take everyone, including pets, with you.
- Do NOT Use Electrical Devices – Turning on lights or using electronics can ignite gas.
- Avoid Flames or Sparks – Don’t light matches, candles, or cigarettes.
- Shut Off the Gas Supply (If Safe) – If you know how, turn off the gas at the main shutoff valve outside.
- Call 911 and Your Gas Company – Report the leak from a safe distance.
If You Suspect a Water Leak:
- Turn Off the Water Supply – Shut off the main water valve to prevent further damage.
- Check Appliances & Fixtures – Inspect sinks, toilets, and water heaters for visible leaks.
- Use a Moisture Meter – If you suspect a hidden leak, a moisture meter can help locate it.
- Dry the Area – Use towels, fans, or a dehumidifier to prevent mold growth.
- Call a Plumber – A professional can repair leaks and inspect for hidden damage.
When to Call a Plumber vs. Emergency Services
Call a Plumber If:
- You have a slow or minor water leak.
- Your water pressure is low, and you suspect a hidden pipe issue.
- You need an inspection for possible gas line damage.
Call 911 and Your Gas Company If:
- You smell gas, hear a hissing noise, or feel dizzy inside your home.
- You see dead plants or bubbles in standing water outside.
- You experience a sudden, unexplained illness that improves when you leave the house.
Gas and water leaks are very serious, but knowing how to identify them and act quickly can prevent costly damage—or even save lives. If you’re ever in doubt, treat the situation as an emergency and seek professional help immediately. Mr. Rooter Plumbing, Orange County, 949.371.2025