Appendix 2: Friction Loss Tables
¾" Pipe
Flow
Velocity
GPM
Ft / S
2
1.20
3
1.80
4
2 .41
5
3.01
6
3.61
7
4 .21
8
4 .81
9
5 .41
10
6.02
1" Pipe
Flow
Velocity
GPM
Ft / S
2
0.74
4
1 .48
6
2.23
8
2 .97
10
3.71
12
4 .45
14
5.20
16
5 .94
18
6 .68
1¼" Pipe
Flow
Velocity
GPM
Ft / S
4
0.86
6
1 .29
8
1 .72
10
2 .15
12
2 .57
14
3.00
16
3.43
18
3.86
20
4 .29
25
5.36
Note: Charts show friction loss per 100' of pipe. To convert to friction loss per foot, move decimal point two places to the left.
Inline Pressure Boosting System
Friction Loss
Ft Hd / 100'
Steel
PVC
(C = 100)
(C = 140)
1.93
1.03
4.09
2 .19
6 .96
3.73
10.53
5 .64
14 .75
7 .91
19.63
10.53
25.13
13.48
31.26
16 .76
38.00
20.38
Friction Loss
Ft Hd / 100'
Steel
PVC
(C = 100)
(C = 140)
0.60
0.32
2 .15
1 .15
4 .56
2 .44
7 .76
4 .16
11 .74
6 .29
16 .45
8 .82
21 .89
11 .74
28.03
15.03
34.86
18.70
Friction Loss
Ft Hd / 100'
Steel
PVC
(C = 100)
(C = 140)
0.57
0.30
1.20
0.64
2.04
1.10
3.09
1 .66
4.33
2.32
5 .76
3.09
7.38
3.96
9 .18
4 .92
11 .16
5 .98
16 .87
9.05
Fric. Loss
Ft Hd / 100'
Velocity
Ft / S
Copper
(C = 130)
1.33
1.50
1 .99
3.18
2 .65
5 .42
3.31
8.20
3.98
11 .49
4 .64
15 .29
5.30
19 .57
5 .97
24.35
6.63
29 .59
Fric. Loss
Ft Hd / 100'
Velocity
Ft / S
Copper
(C = 130)
0.78
0.41
1 .56
1 .48
2.33
3.14
3.11
5.35
3.89
8.08
4 .67
11.33
5 .44
15.07
6 .22
19.30
7.00
24.00
Fric. Loss
Ft Hd / 100'
Velocity
Ft / S
Copper
(C = 130)
1.02
0.53
1.53
1.13
2.04
1 .92
2 .55
2.90
3.06
4.07
3.57
5 .41
4.08
6.93
4 .59
8 .62
5 .11
10.48
6.38
15 .85
19