Grease trap solutions: when we are speaking to customers and potential customers about grease trap servicing, we often answer questions based on something like this: “why is my grease trap still full after in was pumped recently”? or ” will you charge me for 1000 litres (assuming it is a 1000 litre grease trap) of it is not full of grease?”


These questions are based on a misunderstanding of how grease traps (or as they are also known – grease interceptors) work.  This detailed article on wikipedia explains how a trap works.


In simple terms – the grease trap prevents oil going down the drain into the sewerage system and preventing blocks or issues with the municipal plumbing. Each metro region has its own specific legislation from the local water authority stating which business types need grease traps, how big they should be and how often they should be pumped out / or cleaned. See the Sydney Water pages here.


Grease trap solutions – how does the grease trap work and why is it always “full”


A grease trap or grease interceptor basically is a device filled with water and a filtering system – as water enters the trap from the sinks etc in the kitchen – the trap separates the water from the grease. The grease is kept in the trap and the water is released to the sewerage system.


Overtime, the trap will steadily fill up with grease i.e. it will be pure water after it has been pumped out and cleaned and then will steadily increase from 0% grease component to 100% if it is not cleaned on a regular schedule. As the trap becomes clogged with grease, the risk of overflowing or a major issue (that could result in significant fines for your business) becomes a possibility. In this context you may need an expensive emergency grease trap cleaning.


Waster offers flexible waste services, including grease traps cleaning which you can arrange easily through our online waste shop: