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Septic Tank Lifespan: How Long Does It Last?

Updated: Aug 1

How long can you expect your septic tank to last? This is one of the most common questions when it comes to managing and maintaining a septic system. Can a septic system last 100 years?


The answer to this question depends on various factors and conditions. Generally speaking, a well-maintained septic tank can last for several decades. However, some key factors, such as usage, soil type, and maintenance practices, play a significant role. 


Usage is also one critical factor in determining the lifespan of your septic tank. The more people living in a household, the more wastewater will be generated and flow into the tank.


In these cases, it is important to monitor your system closely and schedule regular maintenance to prevent any potential issues from arising.


What Is The Average Lifespan Of A Septic Tank?


Average Lifespan of a Septic Tank

The average lifespan of a septic tank can vary significantly depending on the factors mentioned above. With proper maintenance and care, a septic tank can generally last 20 to 40 years. 


However, this number can decrease if the system is not properly maintained or if it experiences heavy usage. 


Can A Septic System Last 50 Years? 


Yes, your septic tank can last for about 50 years, but its longevity is greatly influenced by the frequency of pumping, timely inspection, and maintenance. The more you maintain your septic system, the longer it lasts. 


Septic Tank Lifespan Types And Design


eptic Tank Lifespan As Per Types And Design

Different types of septic tanks have varying lifespans depending on their material and design. Here is the average lifespan of the septic tank as per their design or type: 


Plastic Septic Tank Lifespan


Plastic septic tanks, known for being lightweight and resistant to cracking, typically have a lifespan of about 30 years. However, they must be installed carefully to avoid damage from external pressure or improper handling, which can significantly shorten their lifespan.


Concrete Septic Tank Lifespan


Concrete septic tanks are praised for their durability and longevity, often lasting 40 years or more. Their solid structure can withstand external pressures better than other materials. 


Over time, however, they may become susceptible to cracks or leaks due to shifting ground or tree root intrusion. 


Fiberglass Septic Tank Lifespan 


Fiberglass septic tanks offer a good balance between strength and weight, and they resist corrosion well. These tanks can last upwards of 30 to 40 years if properly maintained. 


They're less likely to crack compared to concrete but still require careful installation to prevent damage.


Brick Septic Tank Lifespan


Brick septic tanks, less common in modern installations, have a lifespan that can vary widely, typically around 50 years or more, depending on the quality of construction and maintenance. However, they are more prone to issues like efflorescence and root intrusion, which can affect their structural integrity over time.


What Factors Influence A Septic Tank's Lifespan 


Factors Influence The Septic Tank Lifespan 

  • Usage: The more people using your septic system, the quicker it will fill up and require pumping. If you have a large family or frequently have guests staying over, your septic tank may need to be pumped more often than someone who lives alone.


  • Soil Type: The type of soil in your area can also affect the lifespan of your septic tank. For example, if you have sandy soil that allows for easy drainage, your septic system may last longer compared to clay soil which can lead to clogs and backups.


  • Proper Maintenance: Regular maintenance is crucial in extending the lifespan of your septic tank. This includes pumping the tank every 3-5 years, depending on usage, and inspecting the system for any potential issues.


  • Chemicals Used: Harsh chemicals such as bleach and drain cleaners can harm the bacteria in your septic tank that break down waste. These chemicals can disrupt the balance of bacteria and cause damage to the system over time.


  • Tank Age: The age of your septic tank also plays a role in its lifespan. Older tanks may have corroded pipes or cracks, leading to leaks and potential failures. It is important to have an older septic tank inspected regularly for any signs of wear and tear.


  • Proper Usage: What you flush down your drains can also affect the lifespan of your septic system. Avoid flushing non-biodegradable items such as wipes, feminine hygiene products, and paper towels as they can clog pipes and cause backups.


  • Landscaping: The area above and around your septic system should be properly maintained. Planting trees or shrubs too close to the tank can lead to roots invading the pipes and causing damage.


What Causes A Septic Tank to Go Bad?


Causes a Septic Tank to Go Bad

A septic tank can go bad due to a variety of reasons, including inadequate maintenance and improper usage. 


What you flush down your drains can have a big impact on the lifespan of your septic system. Avoid flushing non-biodegradable items, such as wipes, feminine hygiene products, and paper towels, as they can clog pipes and cause backups. In addition, the overloading of the septic tank can also result in septic tank failure. 


In addition, using harsh chemical cleaners, such as bleach or drain cleaners, to break down solids in the septic tank can disrupt the balance of bacteria in your septic tank. These bacteria are essential for breaking down waste and keeping the system functioning properly.


To ensure the longevity of your septic tank, it is important to avoid items not allowed in the septic tank


Signs Of An Aging Septic Tank


Signs of Septic Tank Getting Old

  • Slow Drains: One of the first signs that your septic tank may be getting old is slow-draining sinks, showers, and toilets. This could indicate that the system is becoming clogged or overloaded with waste.


  • Foul Odors: A healthy septic system should not emit any foul odors. If you start to notice a strong sewage smell around your property, it could be a sign that your septic tank is no longer functioning properly.


  • Lush Grass near Septic Tank: While having a lush lawn may seem like a good thing, it can be a sign of an aging septic system. When the tank becomes overloaded and cannot properly drain into the soil, excess nutrients can cause the grass to grow faster and thicker in that area.


  • Sewage Backup: If sewage starts to back up into your home's drains or toilets, it is a clear indication that your septic tank is not able to handle the amount of waste being produced. This could be due to an old or damaged tank.


  • Standing Water: An aging septic system may also result in standing water above the drain field or around the septic tank itself. This can be caused by a malfunctioning pump or drainage issues within the system. It means you need the septic tank emptying at the moment. 


How Long Can A Septic Tank Go Without Pumping?


Septic Tank Go Without Pumping

It is best to have your septic tank pumped every 3-5 years. But what happens if you neglect to pump your septic tank? How long can it go without being pumped before causing problems? The answer varies and is dependent on several factors.


If you have a small household with few occupants and minimal water usage, your septic tank may be able to go longer without being pumped. However, if you have a larger household or use excessive amounts of water, your septic tank may fill up faster and require more frequent pumping.


How To Increase Your Septic Tank's Lifespan? 


Increase Your Septic Tank Lifespan

To make your septic tank long last, here are the tips you must follow: 

  • Regularly inspect your septic tank to fix issues like slow drains, clogging, and others ASAP. 

  • Avoid flushing or pouring harmful chemicals, grease, or non-biodegradable items down drains or toilets. 

  • Plumb your septic tank every 3-5 years. 

  • In addition, conserving water usage in your household can greatly benefit your septic system.


Conclusion 


Understanding the average septic tank lifespan is crucial for homeowners to effectively plan for maintenance and replacement. By being aware of factors that impact longevity, such as regular inspections and proper care, it's possible to extend the life of a septic system and avoid costly issues.


If you need assistance with septic tank installation, repair, or maintenance services, consider reaching out to Barnes Sewer & Septic. Contact us at (765) 584-7295 to learn more about how we can help ensure the health and longevity of your septic system.

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