One slow fixture usually means a local clog in its trap or branch line, while several drains backing up together point to the main line leaving the house. A plumber clears these with a cable machine or water jet and can run a camera if the problem keeps coming back. Call the number on this page to be connected with a local plumber in Denver.

Reading the warning signs
- One fixture slow: hair, soap or grease close to that drain.
- Toilet gurgles when the washer drains: a partial blockage farther down the line.
- Water rises in the basement floor drain: the main line is likely blocked.
- Sewage smell indoors: a dry trap, a venting issue or a damaged pipe.
What to try, and what to skip
A plunger or a hand auger is fine for a single sink or toilet. Pulling and rinsing a bathroom stopper often clears a tub. Skip chemical drain openers: they rarely reach a deep clog and leave caustic water for whoever opens the line next. If more than one fixture is backing up, stop running water and call.
How a plumber clears it
- Finds the cleanout or removes a fixture to reach the line.
- Runs a cable machine to cut through the blockage.
- Uses hydro jetting for grease or heavy buildup when the pipe can handle it.
- Offers a camera inspection if roots, a sag or a break seems likely.
Denver sewer basics
The city sewer system is run by Denver's Department of Transportation and Infrastructure through Wastewater Management, and Metro Water Recovery treats the wastewater regionally. The pipe running from a house to the city main is generally a private plumbing repair. For a specific address, check with Wastewater Management. If neighbors on the block are backing up too, report it to the city.
Older lines, repeat clogs
Denver's median home was built in 1975, and older houses can have cast iron drains inside and clay sewer laterals outside. Those materials can scale, crack or let roots in, which shows up as the same clog returning. A camera inspection tells you whether cleaning is enough or a repair is due.
What affects cost
Which line is clogged, how easy it is to reach, whether a cleanout exists, the equipment needed and the time of the visit. A main line job costs more than a sink, and a line with no accessible cleanout may need a toilet pulled or a cleanout added. Ask for the price before the work starts, and ask whether a camera look is included or billed separately.
Drain Cleaning questions from Denver homeowners
Why do several drains back up at once?
Who is responsible for the sewer line from my house in Denver?
Are chemical drain cleaners safe to use?
Why does my drain keep clogging?
Related plumbing services in Denver
Helpful guides
Drain Cleaning in nearby cities and towns
Arapahoe County
Jefferson County
Adams County
Douglas County
Broomfield County
Boulder County
Weld County
Elbert County
Park County
Gilpin County
Clear Creek County
Sources
Last updated: