How do I know if my sewer line is clogged?

Author: Mack Ortiz  |  Last update: Wednesday, December 31, 2025

10 Signs Your Sewer Line Is Clogged
  1. Multiple Fixtures Are Clogged. ...
  2. Flushing the Toilet Causes Water to Come Up Elsewhere. ...
  3. Water Draining From Your Washing Machine Causes an Overflow in Other Locations. ...
  4. Drainage at the Cleanout. ...
  5. Slow-Draining Sinks or Toilets. ...
  6. Frequent Plunging. ...
  7. Bubbles in Your Toilet Water. ...
  8. Dark Water.

How do I unclog my main sewer line?

Your step-by-step guide: How to clear a main sewer line clog
  1. Loosen the cap on the drain pipe. ...
  2. Allow any sewer buildup to come out of the drain. ...
  3. Gently feed the auger cable into the main line drain. ...
  4. Run the auger until the clog is broken up. ...
  5. Hose out leftover debris. ...
  6. Pull the auger cable back out of the main line drain.

How do you unblock a clogged sewer pipe?

Boiling Water, Baking Soda, and Vinegar: Sometimes, a combination of boiling water, baking soda, and vinegar can help dissolve and dislodge minor blockages. Pour half a cup of baking soda down the drain, followed by half a cup of vinegar. Let it sit for a few minutes, then flush it with boiling water.

How much does it cost to unclog a main sewer line?

You will likely pay around $350 to $650 to have a plumber unclog a main sewer line unless you have complications like serious damage to the line.

Is a clogged main sewer line an emergency?

Once there is a blockage, you might quickly smell the foul odor or see water leaking. You certainly will know there is a problem. A sewer line clog is a very serious problem that can be considered a plumbing emergency.

Signs of a Clogged Sewer Line and What to Do About It

Does homeowners insurance cover clogged sewer lines?

If the part of the line that is on your property is damaged by something sudden and unexpected, it's usually covered. If there is a sewage backup or the damage is due to a chronic issue, you will likely have to pay out of pocket to repair or replace the line.

Will Drano unclog a main sewer line?

With a clogged basement drain, pouring Drano or similar products down your sewer drain can actually damage your pipes or the glue holding them together, causing more sewer system problems in the future.

How to tell where a sewer line is clogged?

4 Signs Your Main Sewer Line Is Clogged
  1. Sign #1: Multiple drains are backing-up.
  2. Sign #2: Drainage appears in sewer clean out.
  3. Sign #3: Sewage in floor drain.
  4. Sign #4: Water backs up in shower when toilet flushes.

Who is responsible for blocked sewers?

Repairs to sewers

Sewers and lateral drains connected to the public network used to be the responsibility of the property owner. However, most are now maintained by local water companies. If you have any problems with your sewer or lateral drain, for example if it's blocked, contact your local water company.

How much does Roto Rooter charge to unclog a sewer line?

Roto-Rooter's most popular service is clearing sewer lines using an auger strong enough to cut through tree roots. This service typically costs $400 to $600. Unclogging a branch line, or plumbing within the home, costs $350 to $500 on average. The technician uses a smaller auger to snake a drain in your home.

Can a plunger unclog a sewer line?

A plunger works to unclog the main sewer line because it creates an airtight seal with the drain. In the process, it helps force the stubborn clog out of the plumbing system drains.

Where is my main sewer line located?

It can typically be found in the basement, crawl space or garage. You will want to search for a pipe that is approximately four inches in diameter with a screw cap on the top that has a notch or square knob at the top. Note that some homes have an indoor sewer cleanout point, while others may be located outdoors.

Why should you never use baking soda and vinegar to unclog a drain?

The fizzing reaction and gas created may help loosen some small blockages. However, it is not typically strong enough to break down larger clogs or remove hard-to-reach debris. As a result of the above facts, if you have a serious drain clog, using baking soda and vinegar is unlikely to be effective.

How long does it take a plumber to unclog a main sewer line?

Clearing a clogged sewer line can take an hour to a few hours, depending on the blockage. If your lines are severely blocked, a video inspection and more advanced techniques may be necessary to find and address the clog.

What is the best way to unblock a sewage pipe?

Mix half a cup of baking soda with half a cup of table salt and pour it into your blocked drain. Leave it to work for twenty minutes or so and then pour boiling water into the plughole.

Can vinegar unclog a sewer line?

A completely clogged drain will require the help of a professional plumber, but baking soda and vinegar might be a quick fix for a partially clogged drain. This solution will dissolve and push the sludge through the pipes to allow water to flow through easily. Let hot water run for a minute to warm up the pipes.

How to clear a main sewer line clog yourself?

You can tackle a clogged sewer line using other strategies if you don't have a snake on hand. First, you can run hot water down the drain for 5 to 10 minutes to see if that helps break up the clog. If it doesn't, pour equal parts of vinegar and baking soda into a bowl and then pour that mixture down the drain.

How much does it cost to unblock a sewage drain?

Cost Factors of Cleaning and Unclogging Drains

The overall cost of drain unclogging will depend on the blockage type, for instance, a small blockage in a toilet or sink is normally only priced at around £50 to £70. However, a more extensive blockage deep in your drains could end up costing you around £150 to £200.

Who is responsible for a clogged sewer line?

The city is responsible for any sewer problem starting from the main sewer line. This line carries waste from your home and surrounding homes to places like the city's treatment plant. The pipe usually sits outside your property line on public property.

How much does it cost to unclog a sewer line?

Snaking a main line—also known as rodding or augering—costs between $100 and $250, but it can leave residue or smaller debris. Hydro jetting uses a high-pressure hose for major clogs and clears out the pipe more extensively. This service runs a bit higher at $350 to $600.

How do I test my main sewer line?

Test Balls for Drainage Lines

To start the process, make sure your main line sewer cleanout is clear of debris and liquid. Next, insert the test ball and inflate it so that it blocks the main line. Fill the sewer system with water and observe the water level for 15-20 minutes.

How do I know if my underground drain is clogged?

If you notice water gushing back out from the drain pipe or leaking out from the seams on the adapter, that is a sign that there are clogs in your underground drain.

How do I know if my main line is clogged?

Strange Smells and Noises

Foul smells emanating from your sink, bathtub or floor drain indicate a main sewer line blockage. The clog leaves nowhere else for the waste causing the smell to go, leaving a lingering odor. In addition to strange smells, you might also notice a gurgling noise coming from your drains.

How much does it cost to have a roto rooter snake a drain?

Roto-Rooter sewer main line unclog service prices in 2024 may range from $400 to $600. A sewer main line is a large pipe that leads from your house to the larger municipal sewer line outside of your property line, usually buried under the street, and accessed by a drain cleanout.

Can a plumber fix a clogged sewer line?

The Plumber Will Handle the Problem

Plumbers have specialized tools to help clear problem clogs, such as a hydro jetter or more industrial drain snake. If they can unblock the pipe that way, then the cost should be minimal. If the problem is a broken pipe or tree roots, then the repair will be costly.

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