How Long Do Septic Tanks Last – Find Out Now!

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How Long Do Septic Tanks Last

You may be wondering how long do septic tanks last. In this in-depth expert article, we’ll answer these questions and more!
Septic tanks work with bacteria to break down solid waste and decompose the sludge. A septic tank is typically made of concrete or fiberglass and has an inlet pipe, an outlet pipe, and a sludge drain valve. The inlet pipe takes in wastewater from the house while the outlet pipe takes out wastewater after it has been treated by bacteria.

The tank is designed to last for about 15-40 years, but there are many factors that affect the lifespan of a septic tank, including the number of people using the septic tank, how often it is drained and pumped out, what type of soil it is on, and variations in climate. There are different types of septic tanks that have been developed for specific regions around America.

how long do septic tanks last: construction material

Construction materials are an important aspect of septic tank construction. They can affect the lifespan of the septic tank and have a significant impact on the type of septic system that is used. Two main types of septic tanks are steel and concrete septic tanks.

  • Steel tanks are typically cheaper than concrete tanks, but they corrode faster and are not as durable. Steel septic tanks have a 15-year lifespan and are a great option for those who want to install a septic tank but don’t have the time, money, or expertise to do so. The steel tanks are prone to rust and corrosion over time, which may cause leaks and other issues.

how long does a concrete septic tank last

how long does a concrete septic tank last

Concrete tanks are more expensive than steel tanks, but they can last up to 40 years if properly maintained. They also have the advantage of being more environmentally friendly than other tanks because they are made from natural materials that can be broken down by bacteria in the soil.
Another major upside of concrete septic tanks their durability and strength. Concrete is durable because of the way it is made. It’s made up of a mixture of cement, aggregate, and water. Cement is the most important ingredient in concrete because it sets the strength and durability of the material.

how long do plastic septic tanks last

Plastic septic tanks are not as durable as concrete septic tanks. They have a shorter lifespan, and they are cheaper to install. They are lighter and easier to transport, which is a big advantage for those who need to move their septic tank often.


  • Plastic septic tanks are lightweight and easy to transport.
  • They do not corrode like traditional tanks do.
  • They can be installed over a foundation or in an excavation site without the need for concrete slabs or footings.


  • Plastic septic tanks have a 15 year lifespan.
  • While the use of plastic septic tanks is widespread, we need to be more mindful about the impact it has on our environment. Plastic is not environmentally friendly because it takes a lot of natural resources to produce it. It also takes a lot of energy to process, transport and it`s not easily recyclable.
  • They require more maintenance than traditional ones because of the way they are constructed.
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how long do septic tanks last:

How Long Do Septic Tanks Last is a question that has been asked for a long time. Even though there are many factors that can affect the lifespan of septic tanks, it is difficult to answer this question with certainty. Septic tanks typically last between 20-40 years, but the longevity can be affected by a number of factors. These include:

  • Drain field – The septic drain field is the part of the septic system where wastewater (effluent) from a house or building drains into pipes that carry it to a treatment facility. The septic drain field is usually located in an open space, away from buildings and other structures. A properly designed drain field system should be able to handle the wastewater generated by your home or business without any problems.
    Septic drain fields that don’t work can cause a variety of problems. Septic systems that use drain fields must be pumped out periodically because the downstream portion of the pipe is usually clogged with sludge, other debris, and fecal matter. If this process is not done regularly or correctly, wastewater will discharge from the pipe onto the soil surface and contaminate groundwater. A well-maintained drain field will last anywhere from 30-50 years.
  • The number of people – The size of your household also affects the lifespan of your septic system. A large household results in more work for the septic system.
  • The products you use – There are many products that we use in our daily lives that have a negative impact on the septic system. One of the most common household items that shorten the lifespan of a septic tank is bleach. Bleach is used for many purposes around the house. But when it gets into a septic tank it alters the natural bacteria and breaks down organic matter quickly. This causes an overload in the system which leads to problems like clogs and spills. Don’t flush things like flushable wipes, diapers and tampons down the toilet. Diapers, for example, contain chemicals like chlorine. These can damage your septic system and enter your groundwater by way of the drain field. The same goes for feminine hygiene products such as tampons. Use biodegradable toilet paper because bacteria in your septic tank can easily break it down in a few days. Be wary of excessive laundry lint clogging the septic system.
  • Soil Type – Soil composition and pH level has a significant impact on septic tank`s lifespan. Acidic soil will corrode steel, plastic, and cast-iron pipes of the septic tank. Septic tanks installed in non-acidic soils tend to have a higher lifespan. It is important to have the soil composition and pH level tested before installing a septic tank. With a soil test in hand, you can make an informed decision on the type of septic tank you need. If you have acidic soil, don’t despair; there are a few things you can do to solve the problem. You can put in a septic tank that is made from concrete instead of steel.
  • Water table – A water table is the upper surface of the groundwater. It can be found at different depths in the soil, depending on how porous the ground is. The depth of a water table can vary from a few feet to hundreds of feet. The depth at which a water table is located will affect how deep a septic tank needs to be installed. If your area has a high-water table, it means that the soil is unable to properly absorb wastewater from the drain field, which will result in the septic tank overflowing. High water tables are found in areas with heavy rainfall or snowmelt that can’t drain through the soil to the ground below. If your property has a high-water table or your area is prone to flooding. You need to conduct a buoyancy analysis and install an Anti-flotation slab to ensure the septic tank will not float when empty.
  • Roots are one of the most common causes of septic tank damage. They can cause clogging and blockage in the drain field, which can lead to a backup in the system. Root damage can occur if trees are not properly cared for or if they grow too close to the septic tank. The roots can damage the septic system pipes etc.
  • Septic anaerobic bacteria and enzymes are important to the decomposition of waste in a septic tank. They help break down the waste into smaller pieces which can be easily disposed of by the septic tank. While human beings cannot survive without oxygen, these bacteria and enzymes can live in oxygen-free environments like a septic tank or even underwater where there is no oxygen at all. It`s important to have a healthy bacterial population in your septic tank. Avoid using products that harm your septic bacteria. You can also add bio-enzymes to  boost your septic bacteria.
  • Routine Maintenance and Inspections – You may have a septic system that’s chugging along just fine, but that doesn’t mean it’s invincible. Even if you don’t have problems now, you might in the future. It’s always a good idea to plan ahead and have routine inspections done by professionals to extend the lifespan of your septic system. An inspection from professional technicians will be able to tell if your septic system needs any work done.
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how long do septic tanks last: frequently asked questions

A septic tank is a large underground container that contains sewage and wastewater from homes and businesses. The contents of the tank are treated by anaerobic bacteria which breaks down the organic material. This process produces a liquid called effluent, which can then be discharged into a drain field or leach field. We have compiled a list of septic tank frequently asked questions

how long does a septic tank take to fill

Septic tanks are often the forgotten part of a home or business. On average, it usually takes 4 to 5 years for a regular septic tank to fill up. Household size, water usage in the house, septic tank size also after how long it takes for a septic tank to fill.

can a septic system last 100 years

We all know that septic systems are not meant to last a lifetime. A septic tank can last for over 40 years if it is properly maintained and serviced. The lifespan of a septic tank depends on the location, design, and materials used in construction. Regular maintenance of the septic will also affect its longevity.

Can I use bleach if I have a septic tank?

You should not use bleach when you have a septic tank. Bleach is made up of chlorine and sodium hypochlorite and if you pour it into the septic tank, it will kill the septic bacteria. A healthy Septic bacterial population is crucial in the functioning of any septic tank because bacteria is responsible for the decomposition or breakdown of sewage waste.
A lack of a healthy septic bacterial population results in a build up of solids and sludge in the septic system which clogs your pipes leading to overflows and sewage backups in your house.

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septic tank maintenance: is it important?

There is a direct correlation between septic maintenance and how long do septic tanks last. A well maintained septic system will last for many years. A poorly maintained septic tanks results in a lot of problems like sewage backups, health hazards and will eventual require a costly replacement.

how much does it cost to replace a septic tank

Replacing a septic tank is not an easy task. It can be time-consuming and a costly one too. A typical septic tank replacement can cost anywhere between $3,300 to $9,000 or more. The cost of replacing a septic tank varies depending on the size of the tank and what it needs to be replaced with. There are various factors that come into play such as location, soil conditions, and labor costs in your state.

how much does it cost to pump a septic tank

how much does it cost to pump a septic tank

The cost of pumping a septic tank depends on the size of the tank. The cost for smaller tanks is usually less than $400. For bigger tanks, it can be as much as $1,000 or more. On average septic tanks need to pumped every 3-5 years.

what will ruin a septic system?

The septic system is a vital part of every household and it can be ruined by a number of household items like paper towels, tampons, sanitary products and wet wipes. Fats, oil and grease can build up inside of septic tanks and cause them to fail.

how long does it take for poop to break down in a septic tank?

It takes anywhere from 1-3 days for the poop in the septic tank to break down. Poop is made up of 75% water and 25% solid matter.

what toilet paper is best for septic tanks?

Toilet paper is a key part of our daily lives. It is used to wipe away the dirt, sweat and other unpleasantries from our bodies. Biodegradable Toilet Paper are the best for septic tanks because septic bacteria can easily break them down.

How Long Do Septic Tanks Last: Final Thoughts

How Long Do Septic Tanks Last? Septic tanks are an essential component of a septic system. They are used to store and treat the wastewater from the home before it is released into the environment. Septic tanks are usually made of concrete, fiberglass or plastic. The lifespan of a septic tank depends on the material it is made of, how well it is maintained and how often it is used.

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