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Do septic tanks use electricity?

Septic tank power requirements

Septic tanks are an essential part of an onsite septic system as they filter sewage into effluent, which is why it is important to know if a septic tank is powered by electricity. Although a home sewage treatment plant may include electronic parts like an aerobic septic tank pump, the tank itself is independent from electricity. This article will provide you with information regarding the electricity free sewage filtration process in a septic tank. 

How does a septic tank work without any electricity?

When sewage is deposited into a septic tank, the tank utilises the force of gravity, which sorts the waste into three main components; sludge, scum and effluent. Sludge is denser than water, which naturally sinks to the bottom of the tank. The scum floats to the very top of the tank as it is lighter than water, leaving only effluent suspended between the two. The effluent can then be pumped out through sprinklers, which may use electricity. The tank itself however, achieves this waste separation without any power or mechanical parts.

For a higher quality effluent, secondary treatment is required, which occurs when the effluent is transferred to an absorption trench for further sterilisation. By positioning the absorption trench below the tank, the wastewater can be transported to the trench with the force of gravity alone. If this isn't possible, then an electrically powered pressurised pipe may be required to move the effluent.

Looking to install a septic system? Let our septic system experts help you.

Benefits of no electricity use

As septic tanks are not dependant on electricity for operation, there are many benefits of having septic tank, which include: 

  • Low running cost.
  • Not affected by power outages.
  • No risk of damage from power surges.
  • Easy to install.
  • Simple design.
  • Long lasting.

Your local septic tank service professionals

Are you looking for a specialist septic tank service in Queensland regions such as; the Gold Coast, Brisbane, the Sunshine Coast and Logan? Express Wastewater Solutions are industry professionals when it comes to completing professional septic tank installations, repairs and maintenance. We are also fully licensed and experienced with completing a wide range of absorption trench repairs. To discuss your septic tank installation or repair of your absorption trench, call us today on 1300 722 517 or complete our septic tank request form.

Do septic tanks use electricity? Let our experts help you.

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Why Use Express Wastewater Solutions?


    Because we are not a manufacturer and not tied to one particular system we can always offer the best solution for your wastewater needs.


    Because we do this every day we have developed a close knit expert team for every step of the process – from plans and council paperwork to excavations, electrical and plumbing. We handle it all to make the whole process as stress free and quick as possible.


    Most people have never installed a home sewerage treatment plant and don’t know the next step, that is why we offer a free 30 minute phone consult with one of our experts to point you in the right direction.


    We handle your wastewater installation from start to finish we can deal with all the trades, council everything so you don’t have to worry about a thing.


    Have peace of mind knowing that Express are licensed, insured professionals that will do your job right the first time.


    Not sure what system is right for you, or want to know if your system is working properly? Just give one of our friendly wastewater experts a call and they will be more than happy to help.


    We will always look to repair your system rather than replace it if it does not need to be, which will generally save large amounts of money sometimes up to and over $10,000.