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Filter Charts

1. Sand Filter Sizing
2.Cartridge Filter Sizing
3. D.E. Filter Sizing




Sand Filter Sizing Chart:

Flow Rate Turnover Rate
Diameter of Filter Sq. Ft. of Filtration 15 GPM per Sq. Ft. Commercial 20 Gpm per Sq. Ft. Residential 6 hours Commercial 8 hours Residential Pump Size (h.p) Suction Pipe Size (in.)
14 1.07 16 ----------- 5,760 ----------- 1/6 1.5
------------ 22 ------------ 10,560 1/6 1.5
16 1.40 21 ------------ 7,560 ------------ 1/6 1.5
------------- 28 ------------- 13,440 .5 1.5
18 1.77 26 ----------- 9,360 ------------ .5 1.5
------------ 35 ----------- 16,800 .5 1.5
20 2.20 33 ------------ 11,880 ----------- .5 1.5
------------ 44 ----------- 24,960 .5 1.5
22 2.64 39 ------------ 14,040 ------------ .5 1.5
------------- 52 ----------- 24,960 .75 2.0
24 3.14 47 ------------- 16,920 ------------ .75 2.0
------------- 62 ----------- 29,760 .75 2.0
26 3.69 55 ---------- 19,800 ---------- .75 2.0
----------- 73 ---------- 35,040 1.0 2.0
28 4.27 64 --------- 23,040 --------- 1.0 2.0
--------- 85 -------- 40,800 1.5 2.5
30 4.91 73 ----------- 26,280 ---------- 1.0 2.0
--------- 98 ----------- 47,040 1.5 2.5
32 5.58 83 ----------- 29,880 -------- 1.5 2.5
----------- 111 ------------ 53,280 1.5 2.5
34 6.30 94 ------------ 33,840 ----------- 1.5 2.5
------------- 126 ---------- 60,480 2.0 3.0
36 7.07 106 ------------ 38,160 ---------- 1.5 2.5
---------- 141 ----------- 67,680 2.0 3.0
38 7.87 118 ---------- 42,800 --------- 2.0 3.0
--------- 157 ------------ 75,360 3.0 3.0
40 8.72 130 ------------ 46,800 --------- 2.0 3.0
---------- 174 ------------ 83,520 5.0 3.0
42 9.62 144 ------------ 51,840 ------------ 3.0 3.0
---------- 192 -------- 92,160 5.0 4.0



Cartridge Filter Sizing Chart:

Flow Rate Turnover Rate
Sq. Ft. of Filteration .375 GPM per Sq. Ft. Commercial 1.0 Gpm per Sq. Ft. Residential 6 hours Commercial 8 hours Residential Pump Size (h.p) Suction Pipe Size (in.)
20 7.5 ----------- 2,700 ----------- 1/6 1.5
------------ 20 ------------ 9,600 1/6 1.5
25 9.4 ------------ 3,373 ------------ 1/6 1.5
------------- 25 ------------- 12,000 1/6 1.5
50 18.75 ----------- 6,750 ------------ 1/6 1.5
------------ 50 ----------- 24,000 .5 2
60 22.5 ------------ 8,100 ----------- 1/6 1.5
------------ 60 ----------- 28,800 .75 2
70 26.25 ------------ 9,450 ------------ .5 1.5
------------- 70 ----------- 33,600 1 2
75 28.12 ------------- 10,123 ------------ .5 1.5
------------- 75 ----------- 36,000 1 2
80 30 ---------- 10,800 ---------- .5 1.5
----------- 80 ---------- 38,400 1.0 2
100 37.5 --------- 13,500 --------- .5 1.5
--------- 100 -------- 48,000 1.5 2.5
150 56.25 ----------- 20,250 ---------- .75 2
--------- 150 ----------- 72,000 3 3
160 60 ----------- 21,600 -------- .75 2
----------- 150 ------------ 72,000 3 3
200 75 ------------ 27,000 ----------- 1 2
------------- 150 ---------- 72,000 3 3
300 112.5 ------------ 40,500 ---------- 1.5 2.5
---------- 150 ----------- 72,000 3 3
400 150* ---------- 54,000 --------- 3 3
--------- 150 ------------ 72,000 3 3
450 150* ------------ 54,000 --------- 3 3
---------- 150 ------------ 72,000 3 3
500  150* ------------ 54,000 ------------ 3 3
---------- 150 -------- 72,000 3 3



D.E. Filter Sizing Chart

Flow Rate Turnover Rate
Sq. Ft of Filtration 1.5 GPM perSq. Ft. Commercial 2.0 GPM per Sq. Ft. Residential 6 Hours Commercial 8 Hours Residential Approx D.E. Capacity (lbs.) Pump Size (hp) Suction Pipe Size (in.)
24 36 -------- 12960 ------- 2.5 .5 1.5
------- 48 ------- 23040 .5 1.5
36 54 ------- 19440 ------- 3.5 .5 2
------- 72 ------- 34560 .75 2
48 72 -------- 25920 ------- 5 .75 2
------- 96 ------- 46080 1.5 2.5
60 90 ------- 32400 ------- 6 1.0 2.5
------- 120 ------- 57600 2.0 2.5
72 108 -------- 38880 ------- 7.5 1.5 2.5
------- 144 -------- 69120 2-3 3

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