2025 Nelsen Corporation Catalog - Catalog - Page 432
17 System Sizing Tables
Technical & Engineering
17 - 12
Systems that are predominately Flush Tanks
Demand
Demand
Load
Load
(GPM)
(GPM)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
25
30
35
40
45
50
3.0
5.0
6.5
8.0
9.4
10.7
11.8
12.8
13.7
14.6
15.4
16.0
16.5
17.0
17.5
18.0
18.4
18.8
19.2
19.6
21.5
23.3
24.9
26.3
27.7
29.1
60
70
80
90
100
120
140
160
180
200
225
250
275
300
400
500
750
1000
1250
1500
1750
2000
2500
3000
4000
32.0
35.0
38.0
41.0
43.5
48.0
52.5
57.0
61.0
65.0
75.0
75.0
80.0
85.0
105.0
124.0
170.0
208.0
239.0
269.0
297.0
325.0
380.0
433.0
525.0
Systems that are predominately Flush Valve
Demand
Demand
Load
Load
(GPM)
(GPM)
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
25
30
35
40
45
50
15.0
17.4
19.8
22.2
24.6
27.0
27.8
28.6
29.4
30.2
31.0
31.8
32.6
33.4
34.2
35.0
38.0
42.0
44.0
46.0
48.0
50.0
60
70
80
90
100
120
140
160
180
200
225
250
275
300
400
500
750
1000
1250
1500
1750
2000
2500
3000
4000
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54.0
58.0
61.2
64.3
67.5
73.0
77.0
81.0
85.5
90.0
95.5
101.0
104.5
108.0
127.0
143.0
177.0
208.0
239.0
269.0
297.0
325.0
380.0
433.0
525.0
