5
Mactrap Grease Boss Operational Manual v Feb 2017
Adjusting the outlet weir to suit inlet flow rate
Factors affecting the efficiency of the MACTRAP Grease Removal Units
*
Caution:
The passing of dishwasher waste and self-cleaning oven waste through the MACTRAP Grease Boss
may affect the efficiency of the oleophyllic attraction of fats and oils in the Grease Boss. High use of certain
emulsified oils and homogenised dairy milks may also affect efficiency.
This type of FOG waste may not be collected as effectively as free flowing fats and oils which can result in
effluent readings carried out by some testing laboratories, showing higher Mg/litre fats and oils readings than
specified.
This problem occurs with all grease trap systems including passive traps. We recommend customers carefully
check the allowable fats and oil effluent permitted in their specific local authority consent. Customers should
include simple management processes to reduce the amount of emulsified oils and milk products entering the
grease removal system to a minimum.
Inflow/outflow
Weir height
Outlet pipe size
Inlet invert
Outlet invert
Up to 1.8Litre/sec
30mm
50mm minimum
315mm
265mm
1.81 to 2.5/sec
20mm
100mm minimum
315mm
245mm
