EGFM requires less material

It is less dense than sand, requiring 15% less media to fill the equivalent filter.


Dia of filter (cm)

Volume if filter bed is 1 mtr (m³)

Total Grade 1 & 3 Sand Required (Tons)

Total Grade 1 & 3 EGFM Required (Tons)

61 0.29 0.15 0.13
160 2.01 3.0 2.6
180 2.54 3.5 3.0
200 3.14 5.0 4.4
250 4.90 8.2 7.2
300 7.07 11.9 10.3

 

EGFM doesn't degrade

It therefore has a longer life span and may not need changing even when the filters are due for refurbishment.