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1"
Schedule 40 pipe 1.049" i.d. / Type L Copper tube 1.025 in. i.d.
Friction Loss
Velocity
Ft Hd./100' of pipe
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
1.5"
Schedule 40 pipe 1.610" i.d. / Type L Copper tube 1.505 in. i.d.
Friction Loss
Ft Hd./100' of pipe
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
2.5"
Schedule 40 pipe 2.469" i.d. / Type L Copper tube 2.465 in. i.d.
Friction Loss
Velocity
Ft Hd./100' of pipe
GPM
Ft/S
Steel
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
Note: Chart shows friction loss per 100' of pipe. To convert to friction loss per foot, move decimal point two places to the left.
APPENDIX IV - FRICTION LOSS TABLES
Velocity
100' Pipe
PVC
Ft/S
Fric. Loss
C=140
0.32
.078
0.68
1.17
1.15
1.56
1.75
1.95
2.45
2.34
4.16
3.11
6.31
3.89
8.85
4.67
11.8
5.45
15.1
6.22
18.7
7.00
22.8
7.78
34.6
9.74
48.1
11.7
82.0
15.5
Velocity
100' Pipe
Ft/S
Fric. Loss
PVC
C=140
0.31
1.08
0.52
1.44
0.79
1.80
1.10
2.16
1.59
2.70
2.83
3.60
4.26
4.51
6.00
5.41
10.2
7.21
15.4
9.01
21.6
10.8
28.7
12.6
36.8
14.4
45.7
16.2
56.6
18.0
Velocity
100' Pipe
Ft /S
Fric. Loss
PVC
C=140
0.35
1.34
0.75
2.02
1.27
2.69
1.92
3.36
2.69
4.03
3.58
4.70
4.59
5.37
5.72
6.04
6.90
6.71
8.22
7.38
11.3
8.73
14.7
10.1
25.0
13.4
44.1
16.8
52.9
20.1
1¼"
Schedule 40 pipe 1.380" i.d. / Type L Copper tube 1.265 in. i.d.
Ft Hd./
GPM
C=130
0.41
4.0
0.87
6.0
1.48
8.0
2.23
10
3.13
12
5.35
14
8.08
16
11.3
18
15.0
20
19.2
25
23.9
30
29.0
40
43.9
50
61.4
60
105
80
2"
Schedule 40 pipe 2.067" i.d. / Type L Copper tube 1.985 in. i.d.
Ft Hd./
GPM
C=130
0.49
10
0.82
15
1.24
20
1.73
25
2.62
30
4.46
40
6.74
50
9.44
60
16.1
70
24.3
80
34.1
90
45.5
100
58.1
120
72.1
150
87.7
200
Ft Hd./
C=130
0.40
0.85
1.46
2.20
3.08
4.11
5.25
6.52
7.94
9.44
12.9
16.8
28.6
43.4
61.1
Friction Loss
Ft Hd./100' of pipe
Velocity
Ft/S
Steel
PVC
C=100
C=140
0.86
0.56
0.30
1.29
1.20
0.65
1.72
2.04
1.10
2.15
3.08
1.67
2.57
4.31
2.33
2.00
5.73
3.10
3.43
7.34
3.96
3.86
9.13
4.93
4.29
11.1
6.00
5.36
16.8
9.06
6.43
23.5
12.7
8.58
40.0
21.6
10.7
60.4
32.6
12.9
84.7
45.6
17.2
144
77.9
Friction Loss
Ft Hd./100' of pipe
Velocity
Ft/S
Steel
PVC
C=100
C=140
0.96
0.43
0.23
1.44
0.92
0.50
1.91
1.55
0.84
2.39
2.35
1.27
2.87
3.29
1.78
3.82
5.60
3.03
4.78
8.46
4.57
5.74
11.9
6.44
6.69
15.8
8.53
7.65
20.2
10.9
8.61
25.1
13.6
9.56
30.5
16.5
11.5
42.7
23.1
14.3
64.7
35.0
19.1
110
59.4
Ft Hd./
Velocity
100' Pipe
Ft /S
Fric. Loss
C=130
1.02
0.52
1.53
1.12
2.04
1.92
2.55
2.90
3.06
4.04
3.57
5.35
4.08
6.85
4.59
8.52
5.10
10.4
6.38
15.7
7.65
22.1
10.2
37.6
12.8
56.7
15.3
79.5
20.4
136
Ft Hd./
Velocity
100' Pipe
Ft/S
Fric. Loss
C=130
1.07
0.35
1.60
.075
2.13
1.24
2.66
1.87
3.19
2.62
4.26
4.48
5.32
6.76
6.39
9.47
7.45
12.6
8.52
16.2
9.58
20.0
10.7
24.4
12.8
34.1
16.0
51.6
21.3
87.8
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