1
Q
1 3/4 FL
A
15.5
2
Q
2” FL
A
8
3
Q
2 1/2” FL
A
2
4
Q
3” FL
A
.8
5
Q
4” FL
A
.2
6
Q
5” FL
A
.08
7
Q
Formula
A
FL x gpm(sq) x length
C(coefficient) Q(quantity) L(length)
8
Q
Fog nozzle pressure low/high
A
75/100
9
Q
Smooth bore pressure
A
50
10
Q
15/16” tip gpm
A
185
11
Q
1” tip gpm
A
200
12
Q
1 1/8” tip gpm
A
250
13
Q
1 1/4” tip gpm
A
300
14
Q
1 1/4” tip master gpm
A
400
15
Q
1 3/8” tip master gpm
A
500
16
Q
1 1/2” tip master gpm
A
600
17
Q
1 5/8” tip master gpm
A
700
18
Q
1 3/4” tip master gpm
A
800
19
Q
1 7/8” tip master gpm
A
900
20
Q
2” tip master gpm
A
1000
21
Q
Master stream nozzle pressure
A
100 plus 25psi appliance
22
Q
Large appliance loss
A
25 psi
23
Q
FDC connection pressure
A
150 psi
24
Q
GPM squared formula
A
150=1.5 squared =2.25
200=2 squared =4
Up one times down one plus .25 650= 6.5 up one 7 x Down one 6=42 Plus .25 42.25
25
Elevation per 10ft in psi
+5 psi
26
Below grade per 10ft
-5psi
27
Residual pumper supply psi
20psi
Dpo
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