Backflow Testing in Centennial, CO

In Centennial, water and sewer come from several separate districts rather than the City, so backflow requirements depend on your address; in Southgate's area, district rules make backflow devices the owner's to maintain, repair and replace. For a test, a repair or a new device, call the number on this page to be connected with a local plumber in Centennial.

Local conditions in Centennial

The City of Centennial doesn't run a water utility. Its own pages say water and sewer come from several water and sanitation districts, with much of the water reaching residents through Denver Water distributors. The city's districts map lists Arapahoe County Water and Wastewater Authority, Castlewood, Cherry Creek Village, East Cherry Creek Valley, Havana, Inverness, Southgate, Willows and South-East Englewood. Southgate, a Denver Water read-and-bill distributor, and Willows, another Denver Water distributor, are both confirmed to serve parts of the city.

For Southgate customers, the district's user rules list backflow devices among the things the property owner must maintain, repair and replace. The fact sheet did not confirm an annual testing requirement for Centennial's districts, so check with yours. Southgate can be reached at 303-779-0261 and Willows at 303-770-8625.

The City does control permits: any work on plumbing or gas systems needs a permit from the Centennial Building Division. Neighborhoods like Southglenn and Castlewood, and the rolling streets along the High Line Canal and Willow Creek trails, have plenty of in-ground irrigation, which is where most residential devices sit.

Repair or replace?

Situation	Usual fix	Why
Failed check valve, body intact	Rebuild with a kit	Rubber parts wear; the casting is fine
Relief valve discharging steadily	Clean or rebuild relief valve	Debris or a worn seat is common
Frost crack in the body	Replace the assembly	Cracked brass can't be reliably repaired
Obsolete model, no parts	Replace	Repair kits are no longer made

Call now to be connected with a local plumber in Centennial.

(303) 529-9880

Signs to watch for

Water seeping around the device or test cocks
Sprinkler zones running weak after the system is turned on
A district letter about cross-connection or a survey
Bulging or split brass after a cold night
A device that hasn't been looked at since you bought the home

Timing through the year

Centennial's freeze-thaw swings are rough on outdoor brass. Drain irrigation devices in fall before overnight lows dip below freezing, and look them over when you recharge the system in spring. Repairs are easiest to schedule before the peak watering months, and if your district does ask for a test, doing it early keeps you ahead of the deadline.

Backflow Testing questions in Centennial

How can I tell which water provider serves my address?

Check your water bill or the City of Centennial's water districts map. Southgate, Willows and several other districts serve different parts of the city.

Who pays for the backflow device and its upkeep?

The owner, at least in Southgate's area. Southgate's user rules list backflow devices among the property owner's responsibilities to maintain, repair and replace.

Is a permit needed to add or replace a backflow preventer?

Centennial requires a permit for any work on plumbing or gas systems, issued by the City's Building Division.

What happens after an assembly fails its test?

It's repaired and retested, or replaced if the body is damaged. Most failures come down to worn rubber checks or debris in the relief valve.