You will need to install a grease trap…
… if you have a business where you prepare, cook or serve food. Waste water from food preparation areas, floor wastes, kitchen sinks, dishwashers and garbage areas should all flow into the grease trap.
By law, local water authorities require that all fats, oils and grease from all commercial food preparation businesses must not be discharged to the sewer system. A grease trap is required to prevent most fats, oils and grease from entering the sewer system where they can solidify and build up to cause blockages, overflows or overload waste water treatment plants.
It is also important to prevent hot liquids from entering a plastic (PVC) sewer system. The pipes can melt and buckle if the waste water discharged to sewer is too hot.
Businesses that require grease traps include: commercial kitchens; catering companies; restaurants and cafes; take-away outlets; shopping centres (with food shops); hospital, nursing home kitchens; hotel/motel kitchens; function centres; food manufacturing facilities; pre-packaged food wholesalers, bakeries and butchers.