FRICTION/FLOW CHART FOR SCHEDULE 40 RIGID PVC PIPE * ENGINEERING DATA, FRICTION FLOW
3/4 in. pipe
1 in. pipe
1-1/4 in. pipe
1-1/2 in. pipe
2 in. pipe
2-1/2 in. pipe
3 in. pipe
4 in. pipe
5 in. pipe
6 in. pipe
U.S. Gal.per min.
U.S. Gal.per min.
Velocity feet per second
Loss in feet
Velocity feet per second
Loss in feet
Velocity feet per second
Loss in feet
Velocity feet per second
Loss in feet
Velocity feet per second
Loss in feet
Velocity feet per second
Loss in feet
Velocity feet per second
Loss in feet
Velocity feet per second
Loss in feet
Velocity feet per second
Loss in feet
Velocity feet per second
Loss in feet
1
.71
.40
.40
.10
0.26
0.03
1
2
1.43
1.44
.80
.35
.51
.12
.36
.05
2
3
2.14
3.05
1.20
.75
.77
.25
.53
.10
3
4
2.85
5.19
1.60
1.28
1.03
.43
.71
.18
4
5
3.56
7.85
2.00
1.94
1.28
.65
.89
.27
.50
.07
.32
.02
.22
.01
5
6
4.28
11.01
2.41
2.71
1.54
.92
1.07
.38
.60
.09
.38
.03
.27
.01
6
8
5.70
18.75
3.21
4.62
2.05
1.56
1.43
.64
.80
.16
.51
.05
.36
.02
8
10
7.13
28.34
4.01
6.99
2.57
2.36
1.78
.97
1.00
.24
.64
.08
.45
.03
10
15
10.69 60.06
6.01 14.81 3.85
5.00
2.67
2.06
1.50
.51
.96
.17
.67
.07
15
20
8.02 25.24 5.13
8.52
3.56
3.51
2.00
.87
1.28
.29
.89
.12
.50
.03
20
25
10.02 38.16 6.41 12.88 4.45
5.31
2.51
1.31
1.60
.44
1.11
.18
.63
.04
25
30
12.03 53.48 7.70
18.06 5.34
7.44
3.01
1.83
1.92
.62
1.34
.26
.75
.06
.48
.02
30
35
8.98 24.03 6.24
9.89
3.51
2.44
2.24
.82
1.56
.34
.88
.08
.56
.03
35
40
10.26 30.77
7.13
12.67
4.01
3.13
2.57
1.06
1.78
.43
1.00
.11
.64
.04
40
45
11.54 38.27 8.02 15.76
4.51
3.89
2.89
1.31
2.00
.54
1.13
.13
.72
.05
45
50
12.83 46.51 8.91
19.16
5.01
4.72
3.21
1.60
2.23
.66
1.25
.16
.80
.05
.56
.02
50
60
10.69 26.85
6.01
6.62
3.85
2.24
2.67
.92
1.50
.23
.96
.08
.67
.03
60
70
7.01
8.81
4.49
2.98
3.12
1.23
1.75
.30
1.12
.10
.78
.04
70
80
8.02 11.28
5.13
3.81
3.56
1.57
2.00
.39
1.28
.13
.89
.05
80
90
9.02 14.03 5.77
4.74
4.01
1.95
2.25
.48
1.44
.16
1.00
.07
90
100
10.02 17.06 6.41
5.76
4.45
2.37
2.51
.59
1.60
.20
1.11
0.08
100
125
8.02
8.71
5.57
3.59
3.13
.88
2.00
.30
1.39
.12
125
150
9.62 12.20 6.68
5.03
3.76
1.24
2.41
.42
1.67
.17
150
175
7.79
6.69
4.38
1.65
2.81
.56
1.95
.23
175
200
8.91
8.56
5.01
2.11
3.21
.71
2.23
.29
200
225
10.02 10.65
5.64
2.63
3.61
.89
2.51
.37
225
250
11.13 12.95
6.26
3.19
4.01
1.08
2.78
.44
250
275
6.89
3.81
4.41
1.29
3.06
.53
275
300
7.52
4.48
4.81
1.51
3.34
.62
300
325
8.14
5.19
5.21
1.75
3.62
.72
325
350
8.77
5.95
5.61
2.01
3.90
.83
350
375
9.39
6.77
6.01
2.28
4.18
.94
375
400
10.02 7.63
6.41
2.57
4.45
1.06
400
425
6.81
2.88
4.73
1.19
425
450
7.22
3.20
5.01
1.32
450
475
7.62
3.54
5.29
1.46
475
500
8.02
3.89
5.57
1.60
500
550
8.82
4.64
6.12
1.91
550
600
9.62
5.46
6.68
2.25
600
650
7.24
2.61
650
700
7.79
2.99
700
750
8.35
3.40
750
1000
11.13
5.79 1000
* Friction loss of water in feet per 100 feet length of pipe. Based on Williams & Hazen formula using constant 150. * Recommended operating flow velocities indicated by boxed areas.
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