4 Signs Your Main Sewer Line Is Clogged

October 03, 2017

The sooner you recognize the warning signs of a main sewer line blockage, the better. A clog in the main sewer line that goes ignored or unnoticed can lead to costly repairs but can also expose your family to contaminated water.

To help keep your family and home safe, we’ve covered 4 warning signs that your home’s main sewer line is clogged.

Let’s take a look at the tell-tale signs of a clogged main sewer line…

Sign #1: Multiple backed-up drains

Check the following water fixtures:

  • Toilets
  • Sinks
  • Bathtubs
  • Showers

If more than one drain is slow moving, gurgling, smells bad or has water backing up, you most likely have a main sewer clog.

You see, your home’s drain lines carry wastewater away from your home and are designed like a tree—the “trunk” is the main sewer line while the “branches” are smaller, secondary drain lines that connect to each water fixture (all secondary lines feed into your main sewer line).

And because every water fixture’s drain eventually connects to the main sewer line, a blockage in that main line will affect various drains in your home.

Sign #2: Drainage in sewer clean out

If you see sewage standing in (or draining out of) your home’s sewer cleanout, you have a main sewer clog.

So, what exactly is a “sewer cleanout” and how can you find yours?

Well, a “sewer cleanout” is a pipe that connects directly to your home’s main sewer line and gives plumbers direct access to clear any blockages. In most Colorado homes, the sewer cleanout is usually located just outside your home or in the basement and is marked by a round or rectangular cap (sometimes titled “sewage” or “cleanout”).

Examples of what your sewer cleanout might look like:

Sign #3: Sewage in floor drain

If your main sewer line is clogged, all the sewage and waste water sitting in the pipes have nowhere to escape. Which means, eventually, the sewage will force its way into a secondary drain.

And when this happens, you’ll soon be able to see (and smell) sewage coming up from floor drains.

Sign #4: Water backs up in shower when toilet flushes

If you notice that water backs up in random places as you’re using water fixtures, you likely have a blockage in the main sewer line.

Two common examples of this include:

  • When you flush your toilet, water backs up into the bathtub/shower.
  • When you run your washing machine, sinks or toilets start to overflow.

You see, a clog in the main sewer line means all the wastewater that is trying to leave your home now has nowhere to go and is eventually forced back up other drain lines.

In the Denver area and think you have a clog in your main sewer line?

In Colorado, the average cost for drain clearing ranges from $100 to $500. The price varies depending on factors such as the severity and location of the clog.

But the good news is that we'll clear your main drain for just $93. And the best part? If we can’t clear the clog in your main sewer line, the call is free.

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Need help from a Colorado Plumbing, Heating, Cooling, or Electrical Specialist? 

For your convenience, you can request an appointment in one of two ways:

  • Call us at (303) 436-2525 for immediate assistance.
  • Click on the button below to schedule your appointment online.


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