Gas Line Pressure Testing in Dallas, TX

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A pressure test shows whether your gas piping is tight, and in Dallas it's the step between a gas repair and working burners. The piping is closed off from the meter, filled to 3 psi and read on a diaphragm gauge while a City of Dallas plumbing inspector times it for at least 15 minutes. If the needle holds and the appliances pass inspection, the inspector releases the meter to Atmos Energy so your gas can come back on.

Dallas 24 PLUMBER tests gas systems under Texas plumbing license # M-27587. Meter already locked? Read our red tag and city gas test guide. Leak not found yet? Start with gas line repair.

Gas odor in the house? Leave the building first and bring everyone out. Leave lights, thermostats and the garage door opener alone, and don't strike a match or lighter. Call 911 or Atmos Energy once you're outdoors, then call us at (844) 313-1397 and we send our on-call plumber right away.

When Dallas calls for a gas pressure test

The City of Dallas gas test guidelines (November 2025) list when an inspector must witness a test and release the meter to Atmos. The main ones:

A leak repair or Atmos red tag. Fixing a gas leak or replacing any gas pipe, including after the piping fails the check Atmos runs before restoring service.
New piping. A run for a standby generator, tankless water heater or outdoor kitchen goes on the gauge before any appliance is hooked up.
An addition or alteration. Gas pipe moved, extended or rerouted in a remodel is a change to the system.
A pulled meter. Meters removed for the Fire Department, Code Compliance or a plumbing inspector, or for tampering.
An unused release. A release not used within 60 days needs a new inspection.

A home sale isn't on the list, but a buyer's inspector who spots rusty pipe may still ask for one.

How the test is done on a Dallas job

Permit before work. The plumber doing the work pulls a single-trade gas test permit in DallasNow, the city's permitting system.
Separate the piping. The gas is turned off and the house side is cut off from the meter, so the gauge reads only the customer's pipe.
Take appliances out of the circuit. Most appliance controls aren't rated for 3 psi, so those appliances are unhooked and the pipe ends capped; closing the shut-off is enough only for equipment rated that high.
Pump it to 3 psi. Air goes in until a gauge approved under the Dallas Plumbing Code reads 3 psi, then the pump is closed off.
The 15-minute watch. The city inspector watches the gauge for at least 15 minutes. The test covers the yard line, the house and any other building with gas.
Appliance and heat check. The inspector looks over each gas appliance, and the home needs approved vented heat that can hold at least 70°F, measured three feet above the floor (existing approved unvented heaters can stay if the code official approves).

If the needle drops

A drop on the gauge that can't be put down to something else, such as a temperature swing, means the piping leaks, so the inspection doesn't pass and the meter stays off. Joints within reach get leak-detecting solution or an ultrasonic leak detector; if they're dry, branches are capped and tried one at a time until the run that won't hold turns up, in the attic, a wall, under a pier-and-beam floor or in the yard. The bad part is replaced and the whole system retested with the inspector there.

Old work can add to the job. The permit holder must bring any gas installation never approved under a current or earlier code up to today's code before release, such as an unpermitted patio line. A January 2026 city memo, written ahead of winter weather, adds a $300 fee to every after-hours inspection request, on top of the permit fee.

From a passed test to gas from Atmos

Atmos Energy says it doesn't maintain the gas lines on your property past its meter; they're the customer's responsibility. Once the inspection passes, the inspector sends Atmos the release and you call Atmos customer service to book the meter reconnect. Never cut a lock, peel off a tag or reopen a meter yourself.

Older Dallas homes, yard lines and restaurant kitchens

Plenty of prewar and postwar houses in Oak Cliff, East Dallas and South Dallas, roughly 1920s to 1950s, may still run on older threaded steel gas pipe and valves. Steel yard lines to garages and pool heaters ride the Blackland Prairie clay as it heaves and settles with the weather, and they rust where they leave the soil.

Restaurants in Deep Ellum and Bishop Arts need the same test when a kitchen change adds, moves or replaces gas piping; swapping an appliance connector on the appliance side of its shut-off doesn't count. A commercial space also needs a current Certificate of Occupancy before gas is released; see restaurant gas lines.

From 2900 Botham Jean Blvd in the Cedars, we test gas piping across Dallas. New customers get $50 off, and the dispatch fee is $0 with a repair (see coupons).

Dallas gas pressure test FAQ

What pressure and time does the City of Dallas use for a gas test?

Three psi on an approved diaphragm gauge, held for at least 15 minutes while a City of Dallas plumbing inspector watches. It covers all gas piping from the meter on, including the yard line and every building on the property.

Do I need a gas pressure test to sell my house in Dallas?

A sale isn't one of the conditions the city's gas test guidelines list for an inspection and release. If a test you order finds a leak, though, the repair needs a permit, a witnessed test and a city release.

Will the city inspector need to come inside?

Yes. The inspector needs access to every structure and checks each gas appliance, so have someone there who can open the house, garage and any other building with gas.

What happens if my gas line fails the test?

The gas stays off while the leak is traced and the faulty fitting or pipe is replaced. Then the whole system is tested again for the inspector.

How long do I have to get Atmos out after the release?

Call Atmos customer service to schedule the reconnect soon after the inspector sends the release. If service isn't set up within 60 days, the city requires a new inspection.

Book a gas pressure test in Dallas

Call (844) 313-1397 to set up a test or discuss a red tag or failed inspection. Planned tests are booked at a time that suits you; a gas smell gets our 24/7 emergency service.