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Introduction
The Universal Grease Trap is designed to intercept fats, grease and large food particles present in effluent
discharges from food preparation establishments such as canteens, restaurants and hotels to meet stringent
demands for clean waste water prior to discharge to the sewer.
The hot greasy discharges are cooled when mixed with the larger volume of cooler water in the trap; the grease
separates out and solidifies onto the grease tray which requires regular removal and cleaning.
Note:
This is not an air trap for preventing sewer gas passing upstream.
Definitions
The following terms will be used throughout these instructions to mean the following:
Catering Establishment:
The source of the fats, grease and large food particles may have originated as
examples from restaurants, fast food operations such as cafes, canteens, public house, Chinese and Indian
take-aways, fish and chip shops, sandwich and salad bars.
Effluent:
The hot water and grease mixture discharged from catering establishments.
Liquid:
Mixture of waste water and other substances which remain in the body of the trap.
Discharge:
The waste water discharge from the trap.
NOTE:
This water is not safe for human consumption
under any circumstances.
Function
The principle of the grease trap is to cool down the hot effluent by slowing down its rate of flow and by mixing
with a larger volume of cooler or cold liquid within the trap and to intercept and separate grease, fats and solids.
The hot greasy effluent entering the trap is cooled on mixing with the larger volume of water in the trap; the
grease separates out and settles below the liquid level onto the tray although some grease may solidify and
continue to float.
FLOW
Tray
FLOW
Grease
Liquid
Grease Trap with no Effluent Entering
