Gas line work is the one HVAC-adjacent job where cutting corners is not just costly — it is dangerous. An improperly made gas connection can leak, and a gas leak is a fire and explosion hazard as well as a source of carbon monoxide. It is also work that requires a specific license that many contractors do not hold. In Prince George’s County, gas piping is regulated by WSSC Water through a separate gasfitter license, distinct from the state HVAC contractor license. Swellfort holds that credential — WSSC Water gasfitter license #GF-72241 — so our gas-line installations are properly licensed, permitted, pressure-tested, and inspected. If you need a new gas line run, this is work to have done right, by someone licensed to do it.
Here is the distinction most homeowners do not know: a company can be a fully licensed Maryland HVAC contractor and still not be licensed to run your gas line. In our area, gasfitting falls under WSSC Water’s separate jurisdiction and requires its own gasfitter license. This is not a bureaucratic technicality — it exists because gas work carries real danger, and the license certifies the specific competency to size, run, connect, and test gas piping safely. Before anyone runs a gas line in your home, you should confirm they hold WSSC gasfitter licensure. We do, and we work under it, with the proper permits and inspections that licensure makes possible.
A gas line has to deliver enough fuel to every appliance on it, at the same time, at the correct pressure — and that is a calculation, not an estimate. Each appliance has a BTU demand, the total load determines the required pipe diameter, and the length of the run and the number of fittings all factor in, because gas pressure drops over distance. Add a generator or a second gas appliance to a line that was sized for one furnace, and you can starve everything on it. We size gas lines properly using the load and the run, so every appliance gets the fuel it needs. Undersized gas piping is a common problem when appliances are added without recalculating the line, and it causes appliances to underperform or fail to fire.
Every gas line we install is done to code and documented. We pull the required permit, run and connect the piping to the fuel gas code under our WSSC gasfitter license, and pressure-test the completed line to confirm it holds with no leaks before it is put into service. The work is then inspected. This sequence — permit, licensed installation, pressure test, inspection — is what separates a safe gas installation from a hidden hazard. Unpermitted gas work not only risks safety but routinely surfaces during a home sale, where it can stall the closing until it is corrected and inspected. Doing it right the first time protects both your household and your home’s value.
A quick but important safety note: if you smell gas — the rotten-egg odor added to natural gas — treat it as an emergency. Leave the house immediately, do not operate any electrical switches, appliances, or garage doors (a spark can ignite gas), and once you are safely outside, call 911 and Washington Gas. Do not go back in to investigate. Once the utility or fire department has made the situation safe, we can inspect the system, find the source, and make the licensed repair. This is exactly the kind of hazard that proper, licensed gas-line installation is designed to prevent in the first place.
Licensed, permitted, pressure-tested gas-line installation from a WSSC-licensed gasfitter. Call to schedule your gas line work.
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