If you run a restaurant or cafe in Australia – you may have wondered as to how to clean out a grease trap. The process is pretty simple but you do require certain tools – such as a suction liquids truck!


It should also be noted that you should not clean out a grease trap if you are not a professional. Grease trap cleaning is regulated by your local water authority and a schedule will be set as regards cleaning (see our blog on how often does a grease trap need to be cleaned).


In Sydney metro – you can only select a company that arranges services through a registered transporter – i.e. as monitored by Sydney Water. If you cleaned the trap yourself – it would not be counted by the water authority and you would be fined.


How Waster can help you!


Waster.com.au helps small and medium Aussie companies with waste and recycling services. This ranges from grease trap cleaning to general waste bin collection.


We provide all recycling and ancillary services such as sanitary bins, confidential paper etc.


You can arrange your services online by pressing the button below:


How to clean out a grease trap!


In the points below – we will cover the basic outline of how to clean out a grease trap – this will be what a reputable grease trap cleaning business will do each time you have a scheduled clean.


Turn the water off – the first step is to turn off the water. A grease trap is basically a box of water – i.e. of varying sizes from c. 60 litres up to 10,000 litres. When a trap is newly cleaned it is 100% full of water and will gradually become full of grease and fat if not cleaned.


Open the lid – the lid of a grease trap is often heavy and made from concrete or metal. The truck driver will carry special tools to open the lid if it is an in ground unit. There are also above ground units and under sink units for small traps.


Pump out the contents – by using the suction hose from the truck – the driver will pump out the mixture of water and fats / oils etc from the trap.  This is when a powerful suction hose comes in useful.


Most trucks have c.15m of hose as standard.


How to clean out a grease trap cafe


Scrape down the sides – a good cleaning will involve the driver scraping down the sides of the trap – i.e. for any excess or built up sediment.


Add additional water if excessively dirty – if the trap is not in a good state – i.e. if it has not been cleaned in a long time – the driver may need to add extra water and repeat the process as above.


Dispose of the liquid collected – the truck will empty the liquid at the waste facility.




Now that you know how to clean out a grease trap – I wonder is it something that you would like to do?


You should also remember how much liquid you are talking about – i.e. some traps can be up to 10,000 litres for large restaurants!