I-769N.Deluge
/ Series 769N FireLock NXT
™
Deluge Valve
/ Installation, Maintenance, and Testing Manual
WET PILOT LINE CHARTS
Maximum allowable wet pilot line heights for specific equivalent lengths (heights are based on 1/2-inch/21.3-mm Schedule 40 pipe and a
1/2-inch/21.3-mm sprinkler)
0
20
40
60
80
100
120
140
10
25
50
100
200
300
400
500
1000
1½ – 2-inch/48.3 – 60.3-mm Valve Sizes
LENGTH OF PIPE (FEET)
M
A
XIMUM PIL
O
T LINE HEIGHT (FEE
T)
300 psi
280 psi
260 psi
240 psi
220 psi
200 psi
140 psi
120 psi
100 psi
80 psi
60 psi
40 psi
20 psi
180 psi
160 psi
280 psi
260 psi
240 psi
220 psi
200 psi
180 psi
160 psi
140 psi
120 psi
100 psi
80 psi
60 psi
40 psi
20 psi
300 psi
0
20
40
60
80
100
120
140
10
25
50
100
200
300
400
500
1000
2½ – 3-inch/73.0 – 88.9-mm Valve Sizes (Includes 76.1 mm)
LENGTH OF PIPE (FEET)
M
A
XIMUM PIL
O
T LINE HEIGHT (FEE
T)
I-769N.Deluge_13
REV_F
