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Filter Area
Filter Model
2
(Ft
)
THS3461
13.5
THS3484
19.0
THS4272
19.7
THS4284
23.2
THS4296
26.7
Media Type
Media Size
Pea Gravel
1/4" - 1/8"
#20 Standard
Sand
.018"-.022"
(.45mm-.55mm)
NOTE:
1. All gravel and sand should be washed and screened. It should contain less than
1% of loam, clay, sand, shells, dirt organic impurities or other foreign matter.
2. It is recommended that all media used be NSF approved.
Tank Owner's Manual
9/26/05
APPENDIX B
Total Media
Sand Media
Requirement
3
(Ft
)
16.6
(1660 lbs.)
(1110 lbs.)
23.5
(2350 lbs.)
(1440 lbs.)
29.1
(2910 lbs.)
(2210 lbs.)
34.6
(3460 lbs.)
(2710 lbs)
39.9
(3990 lbs.)
(3130 lbs.)
Uniformity
Specific Gravity
Coeffictient
Greater than 2.5
Less than 1.5
2.65
Less than 1.5
Gravel Media
3
(Ft
)
3
(Ft
)
(Optional)
11.1
5.5
(550 lbs.)
9.1
14.4
(910 lbs.)
7.0
22.1
(700 lbs.)
7.5
27.1
(750 lbs.)
8.6
31.3
(860 lbs.)
Freeboard
Sand Bed
Height
Depth
(in.)
(in.)
7 1/2
11
8 1/2
16
Pg. 17 of 23
Rev. D
Gravel
Depth
(in.)
8 5/16
7 1/2
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