Your Gas Line Won’t Announce a Problem. You Have to Know What to Look For.
Gas lines are mostly invisible. They run under slabs, through crawl spaces, behind walls. That’s fine when everything’s working. But it also means a developing problem can go unnoticed until it becomes serious.
The good news is that gas line issues do leave clues. You just have to know where to look and what counts as a real warning sign versus normal quirks of an older home.
The Smell Is the Most Obvious Sign
Natural gas is odorless on its own. Utility companies add mercaptan, a sulfur compound that smells like rotten eggs, so leaks are detectable. If you catch that smell near an appliance, near your meter, or anywhere in the house, treat it as an emergency. Don’t look for the source yourself. Get out and call 911 or your gas company first, then call a plumber once you’re safe.
A faint intermittent smell is also worth taking seriously. Small leaks can be inconsistent, especially at joint fittings that loosen over time.
Dead or Dying Grass in an Unusual Pattern
Underground gas lines that develop even small leaks can affect the soil around them. If you notice a strip or patch of dead grass that doesn’t match normal drought patterns, especially if it follows a straight line across your yard, that’s worth investigating. Gas displaces oxygen in the soil and can kill vegetation before you ever smell anything at the surface.
Higher Gas Bills Without a Clear Reason
If your usage hasn’t changed but your bill has gone up, and you’ve ruled out a rate increase from the utility company, a leak is a possible explanation. Escaping gas is wasted gas, and the meter doesn’t know the difference between what you used and what leaked out.
Visible Damage to Exposed Pipe
Black iron pipe in crawl spaces and utility areas can rust and corrode over time, especially in a coastal climate like the Lowcountry. Visible rust, pitting, or moisture collecting around fittings are all signs that the pipe is aging and should be evaluated. CSST can be damaged by physical contact during renovation work, and the protective coating can be cut or abraded without the pipe itself being punctured yet.
Appliances That Don’t Perform Right
Yellow or orange burner flames instead of clean blue ones, pilot lights that won’t stay lit, appliances that run but never seem to reach temperature, these can all point to a supply problem. Sometimes it’s the appliance. But sometimes it’s the line feeding it.
An Older Home That’s Never Had the Lines Inspected
If you bought a home built before the 1990s and the gas lines have never been looked at, now is a reasonable time. Not because they’re definitely failing, but because older black iron systems can have decades of wear and the connections used before modern fittings were standard can loosen over time. A licensed plumber can pressure-test the system and tell you exactly where you stand.
When to Call
If you’re smelling gas, call immediately and leave the house. For the other signs on this list, don’t wait weeks to schedule it. A gas leak that’s small today doesn’t stay small.
Honest Abe Plumbing handles gas line repair and replacement throughout Summerville, North Charleston, Goose Creek, Hanahan, Moncks Corner, Daniel Island, and the surrounding Lowcountry. Call us at 843-609-6626 or Get a Quote and we’ll get someone out to take a look.