If a Centennial home smells of gas, leave first and then call 911 and Xcel Energy at 1-800-895-2999 from outside. Repairs, extensions and tests on the piping after the meter need a plumber and a city permit, so call the number on this page to be connected with a local plumber in Centennial.
Centennial conditions
Centennial incorporated in 2001 from unincorporated Arapahoe County, so although the city is young, many of its neighborhoods are not. Areas like Southglenn and Castlewood on the west side were built well before the city existed, and their gas piping has often been extended through several rounds of furnace, water heater and kitchen updates. East of I-25 the subdivisions are generally newer, with flexible tubing and gas fireplaces common.
Xcel Energy is the gas and electric utility the city lists. The City of Centennial Building Division at the Civic Center on East Arapahoe Road is direct about permits: any work on gas, plumbing, mechanical or electrical systems needs one. That includes adding a branch for a range or dryer, replacing a section of leaking pipe and moving an appliance.
Repair, replace or reroute
| Situation | Typical fix | Reason |
|---|---|---|
| Leak at a single fitting or valve | Repair or replace that part | The rest of the system tests tight |
| Corroded run in a garage or crawl space | Replace that section | Surface rust tends to keep spreading |
| New appliance on an old, small line | Run a new, larger branch | An undersized line starves burners |
| Old capped stubs from removed appliances | Cut back and cap at the main | Unused branches are a leak risk |
| Flexible tubing without a bonding clamp | Add bonding | Required to reduce lightning damage |
What to watch for
- A rotten-egg odor: leave the house, then call 911 and Xcel
- A soft hiss at the meter or behind an appliance
- Flames that lift, flutter or burn mostly yellow
- Soot around a furnace or water heater
- A pilot that drops out after the furnace starts
Timing and seasons
Late summer and early fall are the easiest times to book gas work in Centennial. Furnaces are about to start running every night, and a fitting that has been weeping slowly will show up once the system is under steady demand. If you are adding a gas range or replacing a water heater, schedule the line work ahead of the appliance delivery so the permit, pressure test and inspection are done before you need the new unit. In the middle of winter, keep the furnace running while a plumber works elsewhere on the system whenever possible, and plan around inspection dates so the house is not without heat on a cold night.
Gas Line Services questions in Centennial
Does gas piping work here need a permit?
Where does the utility's piping end and mine begin?
Can a plumber add a gas line for a new range, dryer or fireplace?
Does a Front Range winter change anything about gas line work?
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