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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.
Schedule 40 pipe 0.824 in. i.d. / Type L Copper tube 0.785 in. i.d.
Friction Loss
Flow
Velocity
GPM
Ft / S
Steel
(C=100)
2
1.20
1.93
3
1.80
4.09
4
2.41
6.96
5
3.01
10.53
6
3.61
14.75
7
4.21
19.63
8
4.81
25.13
9
5.41
31.26
10
6.02
38.00
Schedule 40 pipe 1.049 in. i.d. / Type L Copper tube 1.025 in. i.d.
Friction Loss
Flow
Velocity
GPM
Ft / S
Steel
(C=100)
2
0.74
0.60
4
1.48
2.15
6
2.23
4.56
8
2.97
7.76
10
3.71
11.74
12
4.45
16.45
14
5.20
21.89
16
5.94
28.03
18
6.68
34.86
Fric Loss
Ft Hd / 100'
Ft Hd / 100'
Velocity
Ft / S
PVC
(C=140)
1.03
1.33
2.19
1.99
3.73
2.65
5.64
3.31
7.91
3.98
10.53
4.64
13.48
5.30
16.76
5.97
20.38
6.63
Fric Loss
Ft Hd / 100'
Ft Hd / 100'
Velocity
Ft / S
PVC
(C=140)
0.32
0.78
1.15
1.56
2.44
2.33
4.16
3.11
6.29
3.89
8.82
4.67
11.74
5.44
15.03
6.22
18.70
7.00
Schedule 40 pipe 1.38 in. i.d. / Type L Copper tube 1.265 in. i.d.
Flow
Velocity
GPM
Copper
(C = 130)
1.50
4
3.18
6
5.42
8
8.20
10
11.49
12
15.29
14
19.57
16
24.35
18
29.59
20
25
Schedule 40 pipe 1.61 in. i.d. / Type L Copper tube 1.505 in. i.d.
Flow
Velocity
GPM
Copper
(C = 130)
0.41
6
1.48
8
3.14
10
5.35
12
8.08
15
11.33
20
15.07
25
19.30
30
24.00
35
40
Friction Loss
Ft Hd / 100'
Ft / S
Steel
PVC
(C=100)
(C=140)
0.86
0.57
0.30
1.29
1.20
0.64
1.72
2.04
1.10
2.15
3.09
1.66
2.57
4.33
2.32
3.00
5.76
3.09
3.43
7.38
3.96
3.86
9.18
4.92
4.29
11.16
5.98
5.36
16.87
9.05
Friction Loss
Ft Hd / 100'
Ft / S
Steel
PVC
(C=100)
(C=140)
0.95
0.57
0.30
1.26
0.97
0.52
1.58
1.46
0.78
1.89
2.05
1.10
2.36
3.09
1.66
3.15
5.27
2.83
3.94
7.97
4.27
4.73
11.17
5.99
5.52
14.86
7.97
6.30
19.03
10.2
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
Fric Loss
Ft Hd / 100'
Velocity
Ft / S
Copper
(C = 130)
1.08
0.48
1.44
0.82
1.80
1.25
2.16
1.75
2.71
2.64
3.61
4.50
4.51
6.81
5.41
9.54
6.31
12.69
7.21
16.25
7
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