How To Unclog A Septic Tank (2023)

Table of Contents

  • Why Do Septic Tanks Clog?
  • Safety Considerations
  • Clogged Septic Repair Instructions
  • DIY Septic Clog Repair vs. Hiring a Professional
  • Frequently Asked Questions (FAQs)

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  • Working time: 1 hour
  • Skill level: Intermediate
  • Project cost: $50

Tools

  • Gas mask
  • Safety goggles
  • Pry bar
  • Wooden pole or steel rod
  • Gallon bucket

Materials

  • Thick rubber gloves
  • Bleach

If your home has a septic system, keeping it in operating condition is essential, as a clogged tank can result in a cascade of problems. If you notice your pipes are draining slowly or backing up, there’s a good chance that the lines are clogged.

If you suspect the clog is in the septic tank, you may be able to fix the issue without professional help. It’s best to undertake this project if you’re familiar with septic issues. Also be warned that any work involving the tank is likely to be odorous. But with the right precautions and tools, you can potentially save money by learning how to unclog a septic tank drain pipe on your own.

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(Video) Unclogging A Septic Tank (Most Common Clog)

Why Do Septic Tanks Clog?

Septic systems can be more prone to clogging than municipal wastewater systems for a few reasons—including the smaller pipes and restricted reservoirs. For homeowners who aren’t familiar with septic lines, this can come with a learning curve.

Perhaps the biggest rule when it comes to using a septic system is that you shouldn’t flush anything other than human waste and toilet paper down the drain. Even in the kitchen, it’s advisable to skip the garbage disposal and dump leftovers in the trash.

The Environmental Protection Agency (EPA) also recommends getting your septic tank pumped every two to five years, depending on the capacity of the tank and the demands of your household. You want to pump your tank before it is full to avoid unnecessary problems.

Safety Considerations

If you have to open the lid to access your septic tank as part of the process of unclogging a drain, it’s especially important to be aware of safety guidelines. Septic tanks can release powerful fumes, which may cause lightheadedness or even unconsciousness. You should wear a proper gas mask and never lean over or attempt to climb inside the tank. It’s advisable to work with a partner so you can look out for each other.

If you’re attempting to clear a clogged septic line, wear protective gloves and clothes. Any tools that you use should be thoroughly sanitized in a bleach solution when you’re done.

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(Video) Clogged Septic Tank Toilet Bubbles and Backs Up

Clogged Septic Repair Instructions

1. Prepare Your Tools and Protective Equipment

Before attempting to unclog a septic line, prepare everything you will need to clean up afterward. Put on rubber gloves, safety goggles and a gas mask. Also be sure to wear durable clothing that covers your arms and legs. In a gallon bucket, mix five parts water and one part bleach to create a sanitizing solution.

2. Access the Septic Line

Find the septic tank cover in your yard that is closest to your house. If you don’t know where this is, you may need to refer to your home’s as-built drawings. If the lid isn’t easy to remove on your own, use the pry bar to gently lift one side. Then pick up the lid and set it somewhere nearby. Being careful not to lean too far over the side of the opening, look for the end of a pipe that runs from the septic tank to your home.

3. Clear Visible Clogs

Using the wooden pole or steel rod, gently but firmly push the scum layer to the side of the pipe or tank. If you notice water refilling the reservoir, this is your sign that you’re clearing the clog. Continue to push the pole or rod into the pipe.

(Video) Clogged Septic Tank

If you probe the pipe and don’t notice any change in water flow, the clog may be in a harder-to-access position. It may be possible to rent a mechanical auger to reach farther into the line, but this could potentially damage the line if you aren’t experienced.

4. Clean and Sanitize

Immediately after the line is clear, put all the materials you used into the bleach solution for at least five minutes. Then dump the solution directly into the septic tank, not down a drain. Replace the lid to the tank. Wash your clothes in a sanitizing cycle in the washing machine and thoroughly shower.

5. Get Your Septic Tank Professionally Pumped

If the clog was the result of the septic tank being full or close to capacity, schedule to have a septic professional pump the tank as soon as possible. Check that the professional will also inspect the area at the same time for any leaks or other issues.

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(Video) HOW TO CLEAR A HOME MAIN LINE DRAIN STOPPAGE ON A SEPTIC SYSTEM

DIY Septic Clog Repair vs. Hiring a Professional

Perhaps the most compelling reason to hire a septic professional for help clearing a clogged septic pipe is that the job is often unpleasant. Even with the proper personal protective equipment, working with the septic system can be messy. So while the task itself may appear straightforward, it’s understandable if you want to opt out of doing it yourself.

Frequently Asked Questions (FAQs)

What can I use to unblock a septic tank?

Septic tanks rely on a delicate biome balance to work properly. For that reason, you should only use natural ingredients (such as vinegar and baking soda) or items that are designated specifically to unblock septic tanks. Also avoid using sharp tools that may damage the pipes.

How do I know if my septic line is clogged?

Signs that your septic line is clogged include household drains that are backed up or draining slowly, greener grass around the tank or above the lines, sewage-like odors in your yard, standing water in the yard and gurgling sounds coming from your drains or pipes.

Can I put Drano in my septic system?

Drano advertises that it has certain formulations that are “septic safe” and that supposedly don’t disrupt septic systems’ helpful bacteria. However, many septic professionals still advise against using these products.

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(Video) $200 Septic Drain Field Repair for Beginners

FAQs

 How To Unclog A Septic Tank? ›

Most clogs aren't reachable without the help of a technician, but a simple combination of household products might help. Mix 1/2 cup of baking soda and 1/2 cup of white vinegar and pour it down your drain. After a minute or two, flush the drain with hot water, and wait to see if that has cleared the obstruction.

How do you free a clogged septic tank? ›

You'll need to create a solution that's around two parts baking soda to one part white vinegar. After 30 minutes, simply flush your drain with warm water, which should start to loosen up the clog deeper down the line.

What can I use at home to unclog my septic tank? ›

First start by mixing a quarter of a cup of Baking soda with a half cup of vinegar and put directly into toilet. Then add two tablespoons of Lemon juice. The baking soda combined with the vinegar causes a chemical reaction that fizzles and helps break down grim and dirt.

How do I know if my septic tank is full or clogged? ›

Signs of Septic System Failure
  1. Water and sewage from toilets, drains, and sinks are backing up into the home.
  2. Bathtubs, showers, and sinks drain very slowly.
  3. Gurgling sounds in the plumbing system.
  4. Standing water or damp spots near the septic tank or drainfield.
  5. Bad odors around the septic tank or drainfield.

Can you put Drano down a septic tank? ›

Drano Advance Septic Treatment work's so easy, You just drop it in and flush. It work's on all septic tanks and pipes safely. Concentrated formula works with enzymes. It helps break down solid waste,paper,oil,grease and protein.

How do I clear my main sewer line septic tank? ›

Steps For How to Clear A Main Sewer Line Clog
  1. Loosen the Main Drain Cleanout Cap (aka Sewer Cleanout Pipe) ...
  2. Remove Cleanout Cap, Allow Water to Backflow to Opening. ...
  3. Insert the Snake into the Sewer Line Pipe Opening. ...
  4. Run the Tool Until All Clogs are Gone. ...
  5. Clean Up and Replace Sewer Cleanout Cap (Don't overtighten.)
May 5, 2023

What does baking soda do to a septic tank? ›

Baking soda should be part of your regular septic tank maintenance, and its unique properties can keep the lines clear, improve the performance of the entire system and prevent harmful backups and unpleasant odors.

How much baking soda and vinegar for septic tank? ›

Pour ½ cup baking soda down the drain. Follow with ½ cup white vinegar. Cover and let sit for 15 minutes. Flush with 2 litres of boiling water.

What are the signs that your septic tank needs to be pumped? ›

Here are some signs that indicate it is time to pump your septic tank.
  • Overdue Pumping.  ...
  • Slow Drains. ...
  • Standing Water. ...
  • Overgrown Lawn Grass. ...
  • Bad Odors. ...
  • Gurgling Pipes. ...
  • Sewage Backup.
May 7, 2022

What will ruin a septic system? ›

Any paper products like tissues, paper towels, tampons, or sanitary products, even some heavier toilet paper, will clog your system if you flush enough of it. Wet wipes are another product that you should never flush into a septic system.

How often do you need to pump a septic tank? ›

Household septic tanks are typically pumped every three to five years. Alternative systems with electrical float switches, pumps, or mechanical components should be inspected more often, generally once a year.

How often does a septic tank need to be emptied? ›

As a general rule, you should only need to empty your septic tank once every three to five years. That being said, the actual frequency will vary depending on your usage and how many people are living in your home. For larger households, your tank may need to be emptied more frequently.

Will ridex clear a clogged sink? ›

Will RID-X® unclog my drain/pipes/toilet? No, however, when used regularly, RID-X® liquid can help break down organic build-up in your pipes, to help prevent clogs before they happen.

Can you pour Coke down the drain septic tank? ›

Dumping a few ounces or even a can of Coke®, Pepsi®, RC Cola® or any other soft drink into a septic system won't hurt the system.

Can Ridex be used in drains? ›

The enzyme is totally safe for pipes and fixtures and actually breaks down the oils, solids and wastes inside the plumbing pipes, safely and inexpensively.

How do I know if my main line is clogged? ›

Here are a few signs that it's your main line that's clogged.
  • Multiple slow-running drains. If more than one drain is running slow, it's probably not a coincidence, but an indication that one clog is causing issues for all of them. ...
  • Water backing up into other drains. ...
  • Gurgling sounds. ...
  • Sewage odors coming from the drains.

Does vinegar clean septic tanks? ›

Dear Glenna: Absolutely! Vinegar is safe and milder than caustic cleaners designed for the toilet, and those commercial cleaning agents can eat away the good bacteria in your septic system.

How much vinegar do I put in my septic tank? ›

For this septic system life hack, you will need 1/2 cup of baking soda and 1 cup of vinegar. First, pour the baking soda down the drain and let sit for a few minutes. Then add the vinegar. Let it sit for another 15 to 20 minutes or until the bubbles stop.

What does hydrogen peroxide do to a septic system? ›

Hydrogen peroxide is ideal for septic systems due to it being a natural and environmentally friendly product. It has no toxic by-products. It will remove any odors from the waste water systems, in a budget-friendly method.

Why wont baking soda and vinegar unclog a drain? ›

Baking soda is a base and vinegar is an acid; when the two are combined, you get a fizzy chemical reaction that has some properties that can eat away at a clog. However, when you use this combination to unclog a drain, it's just plain ineffective.

How long does it take for baking soda and vinegar to drain? ›

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.
  4. Pour boiling water down the drain again.

Is it safe to use baking soda vinegar mix if you own septic tank? ›

Baking soda and vinegar are safe and effective cleaners for your household drains and, best yet, they are 100% safe for your septic tank and drain field. Bleach and ammonia-based cleaners (i.e. most of the cleaning aisle at the big-box stores) can be harmful to the good bacteria in your septic tank.

How much does it cost to empty a septic tank? ›

The average cost to pump a septic tank is about $400, though the price can range between $225–$600 for most residential tanks.

Can heavy rain cause septic problems? ›

Heavy rains and flooding can cause major problems with septic systems. If this happens, affected residents not served by central wastewater systems may need to take precautions to prevent possible sewage contamination. Human exposure to wastewater can lead to disease transmission.

How long does it take septic tank to fill with water after pumping? ›

It takes years to have the tank pumped for the septic tank to fill to its capacity. The average usage for a family of four will fill a septic tank to its working capacity of 1000 – 1500 gallons in approximately one week.

Is Dawn dish soap septic safe? ›

A: Yes it is. I have used Dawn ever since it first came out and have never had one septic issue and I use Dawn for cleaning and spot cleaning a lot of stuff. Also, it's safe to use in animals and birds who wind up getting covered in petroleum so you should feel comfortable using it as well.

What is the best toilet paper for septic tanks? ›

  • BEST OVERALL: Cottonelle Ultra CleanCare Soft Toilet Paper.
  • RUNNER UP: Angel Soft Toilet Paper.
  • BEST BANG FOR THE BUCK: Scott 1000 Sheets Per Roll Toilet Paper.
  • BEST BIODEGRADABLE: Scott Rapid-Dissolving Toilet Paper.
  • BEST RECYCLED: Seventh Generation White Toilet Paper 100% Recycled.
May 17, 2022

What dish soap is septic safe? ›

Safest Dishwashing Detergents
  • Aldi Foaming Dish Soap.
  • Amway Home Dish Drops Automatic Dishwashing Powder.
  • Dropps Dishwasher Pods.
  • ECOS Dishmate Dish Soap.
  • Method Dish and Dishwasher Soaps.
  • Seventh Generation Dish Liquid.
  • Seventh Generation Automatic Dishwashing Gel: Free & Clear.
Jul 18, 2022

Should septic tank always be full? ›

A septic tank should always be “filled” to its normal liquid level, or the bottom of the outlet pipe which carries effluent to the absorption area. This normal liquid level is usually between 8” to 12” from the top of the tank on average (see picture at right).

How long do septic tanks last? ›

The more proactive you are in maintaining your system, the longer it will last. In fact, septic tanks can last as long as 30 years or more. The main goals of a septic tank maintenance program are to prevent the accumulation of solids, as well as any groundwater contamination.

Why does my septic tank overflow when I wash clothes? ›

Washing machines use a lot of water, and doing many loads of laundry in quick succession can overwhelm your septic tank system. If too much wastewater flows into the tank in a short space of time, the tank may be forced to release waste into the drainfield before it has been processed.

What time of year is best to empty septic tank? ›

The best times to pump your septic tank are spring and summer. A tank that is near capacity should be pumped during the spring to avoid flooding from heavy spring rain showers. It's a good idea to pump your tank in the warmer months in preparation for high usage and to make maintenance easier for your technician.

Why septic tank is getting full quickly? ›

If your pipes or septic tank have cracks, wastewater can seep out of your septic tank, but other groundwater can also get into your tank, causing it to fill up quickly. Damage can also occur if someone drives over your septic tank, causing cracking or breaking in the tank. Heavy rainfall and standing water.

Should you flush every time on septic? ›

So remember, you really want to flush as little as possible into your septic system, to avoid clogs, back-ups and even damage to your system. Also, the more solids you put into your tank, the more often you'll have to pump!

Why is Drano bad for septic systems? ›

Drano and Septic Systems

In fact, most plumbers recommend that you never use Drano or any other type of chemical drain cleaner in any type of plumbing system. The reason is that the extreme heat from the chemical reaction that they cause can weaken your pipes and potentially lead to more serious plumbing issues.

What is the best drain field cleaner? ›

Luckily, we're about to dig into the top septic tank treatments for 2023.
  • Best Overall. Drano Septic Tank Treatment. ...
  • Great Anti-Clog Treatment. Cabin Obsession Septic Tank Treatment. ...
  • Most Budget-Friendly. Green Gobbler Septic Tank Treatment. ...
  • Most Long-Lasting. Rid-X Septic Tank Treatment. ...
  • Most Environment-Friendly.
Feb 28, 2023

How do you unclog a toilet when nothing works? ›

Heat up a gallon of hot water on the stove and pour some dish soap into your toilet while the water is heating up. When the water is extremely hot, but not boiling, pour into the toilet carefully. Wait for 10-15 minutes while the dish soap and hot water soften the clog.

Can you leave baking soda and vinegar in drain overnight? ›

Leave it in the drain for an hour or two or overnight, and then flush the drain with hot tap water. For larger drains, such as tubs and kitchen sinks, use about a quarter-cup of baking soda, a half-cup of water to move the powder down, and 2 cups of vinegar.

What breaks down waste in a septic tank? ›

The bacteria that live in the septic tank constantly break down solid waste. The tank's fittings hold the scum and sludge from flowing out into the drainfield. Liquid that is washed or flushed into the tank is known as effluent. In the tank, effluent is partially treated or "clarified" by bacteria.

Why pour hydrogen peroxide down the drain? ›

Preventing Drain Clogs

In case your drain is susceptible to frequent clogs, using hydrogen peroxide may prevent the clogs from recurring. You can do this by pouring hydrogen peroxide (one cup) down the drainage every 14 days. Allow it to settle for an hour and then pour several cups of hot water down the drainage.

What is the thing that plumbers use to unclog drains? ›

A manual drain snake, also known as a plumber's snake or a drain auger, is a small boring tool that rotates slowly as it's physically pushed through a stubborn clog. The terminal end of the device is a corkscrew-shaped hook that is fed into a clogged drain or toilet.

Can I use Drano in a septic system? ›

Drano Advance Septic Treatment work's so easy, You just drop it in and flush. It work's on all septic tanks and pipes safely. Concentrated formula works with enzymes. It helps break down solid waste,paper,oil,grease and protein.

What can you put down a sewer drain to unclog it? ›

In addition to baking soda and vinegar, you can also add water pressure to this mix. To do this, use a 2:1 ratio of vinegar to baking soda, and mix it into 60 gallons of water. As you pour the water down the drain, use a drain snake or plunger to dislodge debris that is blocking water flow.

What can I use instead of Drano for septic? ›

Pour a half cup of baking soda into your drain with a half cup of white vinegar. Let it sit for about thirty minutes, then pour in boiling water. The chemical reaction between the baking soda and vinegar will break down the clog, much like Drano, and the water will flush it out.

Is baking soda and vinegar OK for septic tank? ›

Baking soda and other common household solutions such as vinegar are not harmful to your septic system. Harsh chemicals such as bleach and ammonia can disrupt the good bacteria in your septic tank and should not be used as part of a septic treatment.

Does baking soda and vinegar clean septic tank? ›

Baking soda and vinegar are safe and effective cleaners for your household drains and, best yet, they are 100% safe for your septic tank and drain field. Bleach and ammonia-based cleaners (i.e. most of the cleaning aisle at the big-box stores) can be harmful to the good bacteria in your septic tank.

Can you pour hydrogen peroxide down the drain with a septic tank? ›

Hydrogen peroxide is ideal for septic systems due to it being a natural and environmentally friendly product. It has no toxic by-products. It will remove any odors from the waste water systems, in a budget-friendly method.

What liquid dish soap is safe for septic systems? ›

Safest Dishwashing Detergents
  • Aldi Foaming Dish Soap.
  • Amway Home Dish Drops Automatic Dishwashing Powder.
  • Dropps Dishwasher Pods.
  • ECOS Dishmate Dish Soap.
  • Method Dish and Dishwasher Soaps.
  • Seventh Generation Dish Liquid.
  • Seventh Generation Automatic Dishwashing Gel: Free & Clear.
Jul 18, 2022

Is baking soda and vinegar better than Drano? ›

Look in Your Kitchen Pantry. Baking soda and vinegar may unclog your drain better than Drano ever could. Start by getting rid of the standing water in your drain. If it will go down slowly, just wait until it's gone.

Is Coca Cola good for septic tanks? ›

Dumping a few ounces or even a can of Coke®, Pepsi®, RC Cola® or any other soft drink into a septic system won't hurt the system.

Will Dawn dish soap and hot water unclog a pipe from house to septic tank? ›

Greasy clogs can be cleared with dish soap and hot water.

For this method to work, the drain needs to be cleared of water. Squirt dish soap down the clogged drain and then pour boiling water down the drain.

How effective is baking soda and vinegar to unclog a drain? ›

While the baking soda and vinegar solution is effective in breaking down a clog, it will also cause your drain to become more damaged. The baking soda's abrasive nature will wear down your drain over time. This is why you should avoid using baking soda and vinegar solution for cleaning out your drain.

Is apple cider vinegar safe for septic tanks? ›

Some products that you already use and have around the house are safe for your septic system. Vinegar (white vinegar and apple cider vinegar), Borax, OxiClean, and baking soda are some products that can be used to clean very well and be septic-system safe.

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