The Warning Signs of a Gas Line Problem in an Old Fort Collins Home

Colorado's adopted fuel gas code sets specific requirements for how new gas lines are sized, tested, and inspected, including a mandatory pressure test that has to hold for a specified period before a new line can be approved for service, a step that genuinely can't be skipped regardless of how confident the installation looks.

Why old black iron pipe isn't automatically a problem

A meaningful share of Old Town homes still run original black iron gas piping from decades before PEX and CSST became standard, and black iron in genuinely good condition can last a very long time without issue. Age alone isn't a reason to assume something's wrong, and we're not in the business of scaring homeowners into replacing pipe that's functioning perfectly well.

The real concern is specifically at threaded joints that have loosened or corroded over the decades, not the pipe material itself, which is why a professional inspection looks at joint condition rather than just the pipe's age.

The signs that mean stop and call immediately

A sulfur or rotten-egg smell near any gas appliance is the most obvious and most urgent warning sign, and it should be treated as an active emergency, not something to investigate on your own timeline. If the smell is strong, leave the house immediately and call from outside rather than searching for the source yourself.

A hissing sound near a gas connection, even faint, and dead or dying vegetation in a specific patch over a buried gas line are both signs worth taking seriously and calling about promptly, even without an obvious smell accompanying them.

The subtler signs that are easy to dismiss

A pilot light that won't stay lit, especially if it's a recent development rather than a long-standing quirk of an older appliance, can sometimes indicate an underlying gas supply issue rather than just a worn thermocouple. It's worth having checked rather than assuming it's purely an appliance-side problem.

A gas appliance that seems to be running less efficiently than it used to, taking longer to heat or showing an inconsistent flame color, can occasionally point to a supply pressure issue worth investigating alongside the appliance itself.

What we actually check during a gas line inspection

We use a combustible gas detector to identify any leak precisely rather than relying on smell alone, since some leaks are more detectable by equipment than by nose, especially in a well-ventilated space. We also visually inspect accessible threaded joints and connections for the corrosion or looseness that's the actual underlying risk in older piping, giving you an honest assessment of whether your specific system needs attention or is simply old and fine.

Why the pressure test matters more than it might seem

A newly installed or repaired gas line is pressurized with air or an inert gas and monitored for a set period to confirm it holds pressure without any drop, which would indicate even a very small leak at a fitting or joint. This test happens before the line is ever put into actual gas service, catching problems while the stakes are still low rather than after gas is flowing through a line with an undetected flaw.

It's a required step under code, not an optional extra we're offering, and it's one of the clearest examples of why gas line work specifically shouldn't be handled by anyone unfamiliar with the actual code requirements involved.

If you smell gas intermittently rather than constantly, that's still worth reporting and having checked, since an intermittent smell can sometimes indicate a connection that loosens under specific conditions, like temperature changes or appliance vibration, rather than a constant, easily locatable leak.