A red tag means a gas technician found an unsafe condition and shut off gas to an appliance or to the whole meter. Do not relight it or turn the valve back on yourself. Have a licensed plumber fix the problem, get a city permit and clearance if the leak was on your piping, then Southwest Gas restores service.
Why did Southwest Gas shut off my gas?
Southwest Gas shuts off gas when a technician finds a condition that could cause a fire, an explosion, or carbon monoxide poisoning. Its Arizona tariff says that if "any unsafe or hazardous condition is found to exist on the customer's premises," service "may be disconnected without notice," and the utility will try to tell the customer the reason and the corrective action needed before service can be restored.
The most common reasons a tag goes on:
- A leak on your side of the meter. Found during a leak call, a routine leak survey, or the leak check the utility runs when it turns gas on.
- An unsafe appliance. Signs of poor combustion, a venting problem, or carbon monoxide at a water heater, furnace, or other appliance. Southwest Gas says a properly working gas appliance should have a clear, steady blue flame, and yellow flames can mean improper combustion.
- A bad connector. Old uncoated brass flexible connectors can separate from the tubing and leak, and Southwest Gas says they should be replaced with stainless steel or plastic-coated connectors.
- Damage. A damaged meter, riser, or pipe, including a buried line cut by digging.
A tag can cover a single appliance, with its shutoff valve closed and the rest of the house still running, or the whole meter, locked so no gas flows at all. Read the tag or the technician's notes to see which one you have and why. Our page on how to turn off the gas to your house explains the difference between the meter valve and an appliance valve.
What should I not do after a red tag?
Do not turn the gas back on yourself, and do not use the tagged appliance. This is the one rule that has no exceptions.
- Do not open a locked meter or cut a lock. Southwest Gas's tariff says only its employees or authorized agents can connect or turn on the utility's supply of gas at the meter.
- Do not relight a tagged appliance or reopen its shutoff valve. The technician closed it for a reason, and the problem is still there until someone fixes it.
- Do not bypass the tag with a new connector or a quick patch. A leak or a venting problem needs a real repair, and piping changes need a permit in Phoenix.
If you smell gas at any point, get out, leave the door open, and call 911 and Southwest Gas at 877-860-6020 from a safe place. Do not flip switches or use appliance controls on the way out.
How do I get my gas turned back on after a red tag?
You get gas back by fixing the cause, getting the right sign-off, and then calling Southwest Gas to restore service. Which sign-off you need depends on why the gas was shut off. The City of Phoenix, Southwest Gas, and the Arizona Corporation Commission published a table that answers it.
| Why the gas is off | City permit needed? | Who inspects and clears |
|---|---|---|
| Meter locked for a leak on the customer side | Yes | City |
| Gas shut off at the building for a repair (meter not locked by Southwest Gas) | Yes | City |
| Any new piping or change to existing piping | Yes | City |
| Replacing an appliance in kind, no piping changes | No | Southwest Gas |
| Meter locked for non-payment | No | Southwest Gas |
| Vacant building, meter locked, no piping changes | No | Southwest Gas |
Here is the order for the most common case, a leak on your piping:
- 1Hire a licensed plumber who works on natural gas. They find the leak, repair or replace the bad section, and pressure test the system.
- 2Permit and city inspection. In Phoenix, the plumber pulls a permit, the city inspector checks the repair and the test, and the city issues a gas clearance. Other Valley cities have their own permit offices, so ask the plumber which one covers your address.
- 3Call Southwest Gas to restore service at 877-860-6020. The utility turns the meter on, then runs its own leak check on your piping. Its tariff says service is denied if uncontrolled leakage exists at turn-on, and it can also ask for a certificate from a licensed plumber or a public official before it restores service.
- 4Relight. Southwest Gas has said that someone 18 or older must be present and crews need access to your gas appliances when they relight. The fuel gas code also requires a leak check right after gas is restored and a check of each appliance connection before appliances go back in service.
For a single tagged appliance with a sound gas line, the path is shorter. The appliance gets repaired or replaced, and if the replacement is in kind with no piping changes, no city permit is needed. If the new appliance uses more gas than the old one, like a bigger water heater or a switch to tankless, Phoenix lists an upgrade that needs pipe capacity calculations as permit work with a city clearance.
Our page on gas leak inspection and certification explains the written certificate, and our guide to how a gas line pressure test works covers the test itself.
Who pays for the repair, and who does the work?
The property owner pays for repairs on the owner's side of the meter, and a licensed contractor does that work. Southwest Gas owns the pipe up to and including the meter. Everything after it, including buried yard lines and lines to a grill, pool heater, or garage, is the customer's to maintain. The utility's tariff also says it has no duty to inspect, maintain, or repair the customer's premises beyond what its rules set out.
A few practical notes:
- Renters: tell your landlord or property manager right away, and do not hire out a gas repair on a rental without them.
- Restaurants and businesses: a tag on a range, fryer, or water heater can shut down a kitchen. Ask the plumber for the written test results for your records.
- Older homes: if the meter sits far from the house, the buried line between them is yours, and Southwest Gas tells owners to inspect it for leaks and corrosion periodically.
How long does it take to get gas back on?
It takes as long as the repair, the inspection, and the utility's return visit. A leak on your piping in Phoenix involves at least three stops: the plumber's repair and test, the city inspection, and Southwest Gas turning the meter back on. A simple appliance swap in kind skips the city step. A buried line leak takes longer, because the line has to be located, dug up or replaced, tested, and inspected before Southwest Gas comes back. Southwest Gas offers appointment windows for service calls, and its FAQ says to call ahead when you need a specific time.
What speeds it up: a plumber who pulls the permit the same day, has the line tested and ready when the inspector arrives, and tells you the moment the clearance is issued so you can call Southwest Gas.
HQ Plumbing & Air handles gas leak repair, testing, and certification for homes and businesses across the Phoenix area, and we offer 24/7 emergency service. You get the repair price up front, before any work starts.
A red tag is a pause, not a verdict. Fix the cause, get the sign-off, and the gas comes back on.