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What is an absorption trench?

An absorption trench is simply a trench that is cut into the ground, fitted with piping, rested on gravel and filled back with topsoil. This trench is then used to release sewage waste from toilets and greywater from bathrooms, kitchens and laundry waste.

The absorption trench system

Absorption Trenches are built to suit the purpose of the wastewater requirements of the property they reside on, factors such as required volume and environmental aspects such as soil quality all determine the final characteristics of an absorption trench including depth, length and size.

Absorption Trench Problems? Let our septic system experts help you.

How long does an absorption trench last?

A number of factors can come into play in determining the lifespan of your absorption trench The absorption trench for your septic tank, if properly installed and maintained, should last in excess of 15 years. However, problems can occur if the installation was faulty, if the perforated pipe which runs through the trench gets clogged or if, for some reason, the effluent waste is prevented from draining efficiently into the surrounding soil or evaporating from the area.

For more information on how a septic system works, check out our guide here: How does a Septic System work?

Absorption trench maintenance

Maintaining your septic tank and absorption trenches is essential to ensuring your septic system functions smoothly and efficiently. Keep heavy machinery and traffic to a minimum in areas where an absorption trench is installed and check the surrounding area for evidence of leaks and unpleasant odours. 

If you notice your Absorption Trench is failing, Express Wastewater Solutions can asses your septic system problems and repair or replace septic absorption trenches on properties across South East Queensland.

Your local septic system specialists

Express Wastewater Solutions can take care of all your septic trench problems quickly and efficiently. We have years of experience working with septic tank systems and wastewater treatment plants contact our team on 1300 722 517 or complete our septic trench repair request form today.

What is an absorption trench? 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.