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APPENDIx II - 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
GPM
Steel
Ft/S
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
GPM
Steel
Ft/S
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
2.5"
Schedule 40 pipe 2.469 in. i.d. / Type L Copper tube 2.465 in. i.d.
Friction Loss
Velocity
Ft Hd./100' of pipe
GPM
Steel
Ft/S
C=100
20
1.21
0.66
30
2.01
1.39
40
2.68
2.36
50
3.35
3.56
60
4.02
4.99
70
4.69
6.64
80
5.36
8.50
90
6.03
10.6
100
6.70
12.8
110
7.37
15.3
130
8.71
20.9
150
10.0
27.3
200
13.4
46.3
250
16.8
81.7
300
20.1
98.1
Ft Hd./
Velocity
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./
Velocity
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
Ft Hd./
Velocity
100' Pipe
PVC
Ft /S
Fric. Loss
C=140
C=130
0.35
1.34
0.40
0.75
2.02
0.85
1.27
2.69
1.46
1.92
3.36
2.20
2.69
4.03
3.08
3.58
4.70
4.11
4.59
5.37
5.25
5.72
6.04
6.52
6.90
6.71
7.94
8.22
7.38
9.44
11.3
8.73
12.9
14.7
10.1
16.8
25.0
13.4
28.6
44.1
16.8
43.4
52.9
20.1
61.1
1-1/4"
Schedule 40 pipe 1.380 in. i.d. / Type L Copper tube 1.265 in. i.d.
Friction Loss
Velocity
Ft Hd./100' of pipe
GPM
Steel
Ft/S
C=100
4.0
0.86
0.56
6.0
1.29
1.20
8.0
1.72
2.04
10
2.15
3.08
12
2.57
4.31
14
2.00
5.73
16
3.43
7.34
18
3.86
9.13
20
4.29
11.1
25
5.36
16.8
30
6.43
23.5
40
8.58
40.0
50
10.7
60.4
60
12.9
84.7
80
17.2
144
2"
Schedule 40 pipe 2.067 in. i.d. / Type L Copper tube 1.985 in. i.d.
Friction Loss
Velocity
Ft Hd./100' of pipe
GPM
Steel
Ft/S
C=100
10
0.96
0.43
15
1.44
0.92
20
1.91
1.55
25
2.39
2.35
30
2.87
3.29
40
3.82
5.60
50
4.78
8.46
60
5.74
11.9
70
6.69
15.8
80
7.65
20.2
90
8.61
25.1
100
9.56
30.5
120
11.5
42.7
150
14.3
64.7
200
19.1
110
Ft Hd./
Velocity
100' Pipe
PVC
Ft /S
Fric. Loss
C=140
C=130
0.30
1.02
0.52
0.65
1.53
1.12
1.10
2.04
1.92
1.67
2.55
2.90
2.33
3.06
4.04
3.10
3.57
5.35
3.96
4.08
6.85
4.93
4.59
8.52
6.00
5.10
10.4
9.06
6.38
15.7
12.7
7.65
22.1
21.6
10.2
37.6
32.6
12.8
56.7
45.6
15.3
79.5
77.9
20.4
136
Ft Hd./
Velocity
100' Pipe
PVC
Ft/S
Fric. Loss
C=140
C=130
0.23
1.07
0.35
0.50
1.60
.075
0.84
2.13
1.24
1.27
2.66
1.87
1.78
3.19
2.62
3.03
4.26
4.48
4.57
5.32
6.76
6.44
6.39
9.47
8.53
7.45
12.6
10.9
8.52
16.2
13.6
9.58
20.0
16.5
10.7
24.4
23.1
12.8
34.1
35.0
16.0
51.6
59.4
21.3
87.8
9
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