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Septic tanks are a feature in homes that homeowners and prospective home buyers cringe at the thought of.  A home with a septic tank is one that does not rely on municipal sewers, but rather disposes of waste independently.  A quarter of the U.S. population uses a septic tank, according to Craig Mains who is the technical assistant at the National Environmental Services Center at West Virginia University.         




The way that these systems work is simple:
  • Lighter solids, such as grease and oils, will float to the top of the tank which forms a layer called scum.  Heavier solids will fall to the bottom, called sludge, leaving the middle of the tank filled with wastewater.
  • The two layers of sludge and scum sit in the tank and are broken down by the bacteria found in the wastewater. 
  • The scum and sludge, that has not been broken down by the wastewater will remain in the tank until it is drained by a professional.
  • From the tank, the wastewater flows through pipes into a drainfield, where the wastewater soaks into the soil. 
  • These drainfields are a series of trenches that is one to three feet below the ground.
  • The soil will naturally filter out the contaminants and bacteria will break down any organic material. 

 Maintenance to septic tanks depends on multiple factors: 

  • It depends on the size of the septic tank
  • The amount of waste that is produced by the people who live in the house.
  • The volume of solids that end up in the wastewater.  


Drainfields are a different story because they should not need maintenance; however, there are a few precautions to take: 

  • It is important not to drive over the drainfield with a car or truck
  • Avoid planting any trees or bushes near the area of the drainfield because the roots may disrupt the pipes
  • Avoid using concrete or asphalt to cover the drainfield. Grass is the best cover because it helps prevent erosion and will help remove any excess water.  

Before buying a home with a septic tank there are a few precautions that need to be taken.  Some states require an inspection to the septic tank before buying the house, but regardless if the state requires you or not, it is important to do so anyway.  Inspections will usually consist of: 

  • Checking the condition of the tank
  • If it is in an appropriate distance from your drinking water to avoid any type of contamination
  • To make sure the drainfield is away from any tree roots that may damage it.
  • Another important thing to check is the age of the tank.  Although very well-designed septic tanks will last 25 to 30 years, if you do have to replace it, the cost could be up to the tens of thousands.

Photo Credit: eastmountainpumpingandsepticsystems.com

Posted 12:00 PM

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2 Comments

Taylor Bishop said...
I just wanted to thank you for helping me learn more about septic tanks. I didnt know that the maintenance of the septic tank could actually depend on the size of the tank. Very interested to learn more about this, and the different maintenance methods that are used on small tanks compared to large ones. http://robsseptictanks.com/
MONDAY, SEPTEMBER 18 2017 8:43 AM
Taylor Bishop said...
I just wanted to thank you for helping me understand septic tanks more. I didnt know that the maintenance for septic tanks could actually depend on what the size of the tank is. It definitely sounds important to make sure you understand the general guidelines regarding this, or at least be aware of the different sizes that are available. http://www.clearyplumbingsa.com.au/septic-systems
FRIDAY, JANUARY 26 2018 8:02 AM

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