Tank Owner’s Manual Pg. 16 of 23
9/26/05 Rev. D
APPENDIX A
NOTE:
1. The charts are based on using NSF approved #20 sand in the filters. Variation in
sand media may affect pressure differential values.
2. These charts are for pressure drop through the tanks only. Depending on the location of the
pressure gauges, there will likely be additional contributors to the pressure differential, such
as valves, fittings, etc.
Clean Filter Pressure Drop
0
0.5
1
1.5
2
2.5
3
3.5
0 5 10 15 20 25
GPM/sq.ft
psi
THS 34xx
THS 42xx
Clean Filter Pressure Drops
0
0.5
1
1.5
2
2.5
0 200 400 600
GPM
psi
THS 4296
THS 4284
THS 4272
THS 3484
THS 3461
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