Enough gas for everything
A tankless water heater or pool heater can need much more gas than the appliance it replaces. The pipe size and the meter have to carry every appliance that may run at once.
Leak repair, new lines, and appliance connections
Gas Line Repair and Installation in Mesa and Phoenix
Repair leaking or damaged gas piping and install new gas lines for water heaters, ranges, dryers, fire pits, grills, and pool heaters, with the line pressure-tested before it goes back into service.
Watch for these signs
When to call about a gas line
- The gas utility shut off service and tagged a leak that needs repair
- A rotten-egg smell near an appliance, meter, or line
- A gas line was hit or damaged during yard or remodel work
- You are adding or moving a gas range, dryer, water heater, or tankless heater
- You want gas run to a fire pit, outdoor kitchen, grill, or pool heater
- Old flexible connectors or corroded piping need replacing
Our services
Gas line work we handle
- Gas leak location and repair after the utility has made the site safe
- New gas lines for indoor and outdoor appliances
- Gas line sizing for added or larger appliances
- Appliance connector and shutoff valve replacement
- Pressure testing before the line returns to service
- Underground and exposed line repair and replacement
Your options
Planning a new gas line
We look at the cause, the condition of the existing system, and what will work best for your property.
The route
Running along walls, through the attic, or underground across the yard each changes the material, the protection, and the labor. Underground routes start with marking existing utilities.
Repair or replace the run
A single damaged fitting can be repaired. Corrosion along a run, or old materials that keep leaking, usually points to replacing that section instead.
Planning the work
What affects the price
- Length and route of the line
- Pipe size needed for the appliances
- Underground trenching or wall and ceiling access
- Number of appliance connections and shutoffs
- Permits and inspections your city requires
Gas line permits and digging in the Valley
The City of Phoenix requires a permit for any new gas piping and for changes to existing gas piping other than installing an appliance connector. A permit is also needed after the gas meter is locked off for a leak on the customer's side, and when an upgraded appliance adds to the gas load. Replacing an appliance with the same kind, with no piping changes, does not need one. Other cities set their own rules, so check with your building department.
Before any digging, Arizona 811 has to be called at least two full working days ahead so public utilities are marked. Southwest Gas notes that 811 cannot locate customer-owned buried piping, such as a line from the meter to a pool heater or detached garage, so that line has to be located separately.
What happens next
How gas line work is done
- 1
Tell us the appliances, where they are, and whether the gas utility has shut anything off.
- 2
We confirm the route, the pipe size, and the connection points.
- 3
The line is repaired or installed with shutoffs at each appliance.
- 4
The piping is pressure-tested before gas is turned back on and appliances are relit.
Common questions
Before you schedule
What should I do if I smell gas?
Leave the building right away and, from a safe place, call 911 and Southwest Gas at 877-860-6020. Do not use light switches, phones, or anything that could make a spark near the smell. Once the utility has made it safe, we can find and repair the leak.
Can you run a gas line for a fire pit or outdoor kitchen?
Yes. Tell us where the appliance will go and its gas rating if you know it. The line has to be sized for it along with everything else on the meter.
Does a new gas line need a permit?
In Phoenix, new gas piping, changes to existing piping, repairs after a meter lock-off, and appliance upgrades that add gas load need a permit; a like-for-like appliance swap with no piping changes does not. Other cities set their own rules, so check with your building department.
Will switching to a tankless water heater need a bigger gas line?
Often. Gas tankless heaters can have a much higher gas rating than the tank they replace, so the line and sometimes the meter have to be checked before the switch.
Related services
Related services and guides
Get help
Request gas line service
Tell us what is happening and our team will be in touch.