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APPENDIx 2 - FRICTION LOSS TABLES
Note: Chart shows friction loss per 100' of pipe. To convert to friction loss per foot, move decimal point two places
to the left.
1"
Schedule 40 Pipe 1.049 in. i.d. / Type L Copper Tube 1.025 in. i.d
Friction Loss
Velocity
Ft Hd./100' of Pipe Velocity
GPM
Ft/S
Steel
C=100
2.0
0.74
0.60
3.0
1.11
1.26
4.0
1.49
2.14
5.0
1.86
3.24
6.0
2.23
4.54
8.0
2.97
7.73
10
3.71
11.7
12
4.46
16.4
14
5.20
21.8
16
5.94
27.9
18
6.68
34.7
20
7.43
42.1
25
9.29
63.6
30
11.1
89.2
40
14.9
152
1-1/2"
Schedule 40 Pipe 1.610 in. i.d. / Type L Copper Tube 1.505 in. i.d.
Friction Loss
Ft Hd./100' of Pipe Velocity
Velocity
GPM
Ft/S
Steel
C=100
6.0
0.95
0.57
8.0
1.26
0.96
10
1.58
1.45
12
1.89
2.04
15
2.36
2.95
20
3.15
5.24
25
3.94
7.90
30
4.73
11.1
40
6.30
18.9
50
7.88
28.5
60
9.46
40.0
70
11.0
53.2
80
12.6
68.1
90
14.2
84.7
100
15.8
103
Ft Hd./
100' Pipe
PVC
Ft/S
Fric. Loss
C=140
C=130
0.32
.078
0.41
0.68
1.17
0.87
1.15
1.56
1.48
1.75
1.95
2.23
2.45
2.34
3.13
4.16
3.11
5.35
6.31
3.89
8.08
8.85
4.67
11.3
11.8
5.45
15.0
15.1
6.22
19.2
18.7
7.00
23.9
22.8
7.78
29.0
34.6
9.74
43.9
48.1
11.7
61.4
82.0
15.5
105
Ft Hd./
100' Pipe
PVC
Ft/S
Fric. Loss
C=140
C=130
0.31
1.08
0.49
0.52
1.44
0.82
0.79
1.80
1.24
1.10
2.16
1.73
1.59
2.70
2.62
2.83
3.60
4.46
4.26
4.51
6.74
6.00
5.41
9.44
10.2
7.21
16.1
15.4
9.01
24.3
21.6
10.8
34.1
28.7
12.6
45.5
36.8
14.4
58.1
45.7
16.2
72.1
56.6
18.0
87.7
1-1/4"
.
Schedule 40 Pipe 1.380 in. i.d. / Type L Copper Tube 1.265 in. i.d.
Velocity
GPM
Ft/S
4.0
0.86
6.0
1.29
8.0
1.72
10
2.15
12
2.57
14
2.00
16
3.43
18
3.86
20
4.29
25
5.36
30
6.43
40
8.58
50
10.7
60
12.9
80
17.2
2"
Schedule 40 Pipe 2.067 in. i.d. / Type L Copper Tube 1.985 in. i.d.
Velocity
GPM
Ft/S
10
0.96
15
1.44
20
1.91
25
2.39
30
2.87
40
3.82
50
4.78
60
5.74
70
6.69
80
7.65
90
8.61
100
9.56
120
11.5
150
14.3
200
19.1
Friction Loss
Ft Hd./100' of Pipe Velocity
Steel
PVC
Ft /S
C=100
C=140
0.56
0.30
1.02
1.20
0.65
1.53
2.04
1.10
2.04
3.08
1.67
2.55
4.31
2.33
3.06
5.73
3.10
3.57
7.34
3.96
4.08
9.13
4.93
4.59
11.1
6.00
5.10
16.8
9.06
6.38
23.5
12.7
7.65
40.0
21.6
10.2
60.4
32.6
12.8
84.7
45.6
15.3
144
77.9
20.4
Friction Loss
Ft Hd./100' of Pipe Velocity
Steel
PVC
Ft/S
C=100
C=140
0.43
0.23
1.07
0.92
0.50
1.60
1.55
0.84
2.13
2.35
1.27
2.66
3.29
1.78
3.19
5.60
3.03
4.26
8.46
4.57
5.32
11.9
6.44
6.39
15.8
8.53
7.45
20.2
10.9
8.52
25.1
13.6
9.58
30.5
16.5
10.7
42.7
23.1
12.8
64.7
35.0
16.0
110
59.4
21.3
Ft Hd./
100' Pipe
Fric. Loss
C=130
0.52
1.12
1.92
2.90
4.04
5.35
6.85
8.52
10.4
15.7
22.1
37.6
56.7
79.5
136
Ft Hd./
100' Pipe
Fric. Loss
C=130
0.35
.075
1.24
1.87
2.62
4.48
6.76
9.47
12.6
16.2
20.0
24.4
34.1
51.6
87.8
11
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