Centennial does not run its own sewer; service comes from several sanitation districts, so a replacement here covers the private line from your house to your district's main. Which district you are in decides who to call about the main and what connection rules apply. Call the number on this page to be connected with a local plumber in Centennial.

A city of districts
The City of Centennial says water and sewer are provided by several different water and sanitation districts rather than by the city. Its sanitation district map lists Castlewood Water and Sanitation District, Southgate Sanitation District, the Arapahoe County Water and Wastewater Authority, South Arapahoe Sanitation District, Havana Water and Sanitation District, East Cherry Creek Valley Water and Sanitation District and South Englewood Sanitation District No. 1. Each district has its own standards for work where your line meets its main, so knowing your district comes before anything else. Your sewer bill names it.
The city incorporated in 2001 from parts of unincorporated Arapahoe County, but many neighborhoods are older than the city itself. That means a camera can turn up anything from original clay or cast iron to plastic pipe that has sagged or cracked. Rolling hills and ravines in parts of the city can also mean deeper lines or longer runs, which affects the method.
| What the camera shows | Usual direction |
|---|---|
| A single cracked joint or small root intrusion | Spot repair, then keep an eye on it |
| Roots at joint after joint in clay pipe | Full replacement, often by bursting |
| Heavy scale and thin walls in cast iron | Lining if the pipe holds its shape, otherwise replacement |
| Standing water from a sag, or a collapsed section | New line in an open trench, set to proper slope |
Warning signs
- Clogs that come back within months of a cleaning
- A basement floor drain that fills when upstairs toilets flush
- Gurgling from drains you are not using
- Soggy or extra-green grass over the line's path
Timing and permits
The City of Centennial Building Division requires a permit for any work on plumbing systems; it is at the Centennial Civic Center on East Arapahoe Road, 303-754-3321. Your sanitation district may have separate requirements at the main, so the plumber should check both before digging. If you are on Southgate, its line at 303-779-0261 also takes sewer backup calls. Planning a replacement in mild weather, before a failing line backs up into a finished basement, gives you the widest choice of method.
Sewer Line Replacement questions in Centennial
How do I find out which district handles sewer at my address?
Who issues the permit for a sewer line replacement here?
How does a plumber decide between repairing a sewer line and replacing it?
Will tree roots get into a newly replaced sewer line?
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