How do I unclog a main drain line?

Author: Coleman Stiedemann III  |  Last update: Sunday, November 2, 2025

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.

What is the best way to unblock a main drain?

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.

What is the easiest way to clear a blockage in the sewer line?

Start by removing any visible and solid obstructions from the drain, like hair or food particles. Pour 1 cup of baking soda down the drain. Slowly pour the 2 cups of white vinegar down the drain over the baking soda. The mixture will create a fizzing reaction, which can help break down the gunk in the drain.

How do you unclog a drain with a clog deep in the line?

Baking Soda and Vinegar: Pour half a cup of baking soda and half a cup of vinegar down the drain. Cover the drain and let the mixture sit for an hour, then flush with hot water. Plumbing Snake or Auger: A plumbing snake can physically remove blockages that are deeper in the pipe.

How do you unclog a main water pipe?

Using Quick DIY Fixes
  1. Snake the piping with a bent hanger for close-by clogs. If the clog isn't too far down the pipe, a hanger might work! ...
  2. Dump a baking soda, salt, and hot water mixture into the piping. ...
  3. Flush the piping with a mixture of vinegar and baking soda. ...
  4. Suck the clog from the piping using a wet/dry vacuum.

Unclogging Main Drain Line in your Home and Save Hundreds of Dollars Doing it Yourself

How do you unblock a mains water pipe?

DIY Solutions for Clearing Blocked Water Pipes

Explore effective DIY methods to clear minor blockages in your water pipes, such as flushing the system with hot water, using vinegar and baking soda, or applying a plumber's wrench to loosen any visible obstructions.

How do you know if your main line is clogged?

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

What do plumbers use to unclog pipes?

Plumbers choose hydro jetting equipment for the most stubborn, deep-set clogs. This drain clearing tool uses high-pressure water to flush your pipes and remove years of buildup. The water jet is so strong that it can even break up any tree roots that have found their way into your sewer line.

How to unclog an underground pipe?

Hydro jetting is one of the more innovative solutions to blocked pipes. To put it simply: You use a high-pressure hose to blast through the blockage and clear it. Then, you pull out the hose slowly and carefully and voila – the clog is gone!

How do you fix a severely clogged drain?

Loosen clogs by running hot water down the drain for two to three minutes. Pour 1/2 a cup of baking soda down the drain, followed by 1/2 a cup of white vinegar. Cover the drain and let the cleaning solution sit for 15 to 20 minutes. Pour hot water down the drain (or boiling water if your water doesn't get very hot).

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 do you unblock a main waste 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.

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.

What happens if main drain is clogged?

If your main sewer line is blocked, you'll start noticing that water will backup in random places. For example, when you flush the toilet, water will suddenly appear in your bathtub or shower. Alternatively, if you run your washing machine, your sink might start to overflow.

Will Drano unclog the sewer line?

No, Drano® is not recommended to clear a clogged sewer line. Bottle unclogging solutions are designed for minor clogs and are not strong enough to break up more extensive sewer line blockages.

How to clear a main sewer line clog yourself?

Your step-by-step guide: How to clear a main sewer line clog
  1. Step 1: Loosen the cap on the drain pipe. ...
  2. Step 2: Open the cap and let the buildup drain out. ...
  3. Step 3: Feed the auger cable into the drain pipe. ...
  4. Step 4: Run the auger until the clog is clear—and beyond. ...
  5. Step 5: Hose down the pipe and auger cable.

What is the best drain unblocker for outside drains?

After your drain is mostly free of water, simply pour around half a cup of soda crystals or caustic soda into the drain followed by boiling water. Be very careful when using caustic soda because it can be extremely dangerous.

How do you unclog a drain deeply in a pipe?

How to Unblock a Clogged Drain Deep in Pipe
  1. Fill so the plunger's cup is covered with water.
  2. Seal the plunger over the drain tightly.
  3. Pump the plunger for about 20 seconds.
  4. Check if water flows. Repeat if it's still clogged.

What is the most powerful pipe unblocker?

The Santeen Sulfuric Acid Drain Opener proved to be the most potent among all the chemical drain cleaners we tested, effectively dissolving 80% of the hair, 80% of the organic matter, 40% of the grease and 76% of the paper products.

How do you clear a clogged drain line?

Follow these easy steps to unclog your drain:
  1. Start by pouring a pot of boiling water down the drain.
  2. Next, pour a cup of baking soda and 1 cup water/1 cup vinegar solution.
  3. Cover with the drain plug and wait 5 to 10 minutes.

Why won't my snake go down the drain?

You may not be rotating the drain snake enough or you may not be using the right kind of drain snake. Rotate the drain snake more: A drain snake moves down the pipes both by forward motion and by rotation. Rotate the snake more, while continuing to push the snake forward.

How do you unblock a main drain pipe?

Mix 1/3rd of a cup of bicarbonate of soda with 1/3rd of a cup of vinegar in a measuring cup. It will fizz immediately, and you should waste no time pouring it down the clogged drain. The fizzing action will help to remove the gunk, hair, and grime that has built up in the blocked drain pipe.

What to do if main water line is clogged?

When you start to notice a drop in water pressure in your home, or if water ceases coming out of some taps entirely, you may have water supply line clogs. Unclogging them requires professional plumbers: there's no plunger you can use to affect an incoming water line!

Can you snake your own main line?

Snake the Line

For deeper clogs, you may need to get a snake or auger to reach the buildup. You can use a snake to clear out drains, but you can also use it on the main sewer line. Locate the sewer cleanout pipe, which might be near a septic tank or near the main sewer line.

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