Polyethylene tubing maximum flow rate and velocity
Tubing Size
5 ft/sec velocity
7 ft/sec velocity
Flow rates gph
Flow rates gpm
216
3.6
300
5.0
318
5.3
420
7.0
Schedule 40 IPC PVC plastic pipe
Friction loss and velocity characteristics
PressureLoss Per 100 feet of Pipe
Sizes 1/2" to 11/4"
1/2"
3/ 4"
1"
11/4"
0.622
0.824
1.049
1.380
0.840
1.050
1.315
1.660
Well Thickens
0.109
0.113
0.133
0.140
Velocity FPS
Loss PSI
1.05
0.43
0.60
0.11
0.37
0.03
0.21
0.01
2.11
1.55
1.20
0.39
0.74
0.12
3.16
3.28
1.80
0.84
1.11
0.26
0.64
0.07
4.22
5.59
2.40
1.42
1.48
0.44
0.86
5.27
8.45
3.00
2.15
1.85
0.66
1.07
0.17
6.33
11.85
3.61
3.02
2.22
0.93
1.29
0.25
7.38
15.76
4.01
2.60
1.24
1.50
0.33
8.44
20.18
4.81
5.14
2.97
1.59
1.71
0.42
9.49
25.10
5.41
6.39
3.34
1.97
1.93
0.52
10.55
30.51
6.01
7.77
3.71
2.14
0.63
11.60
36.40
6.61
9.26
4.08
2.86
2.36
0.75
12.65
42.77
7.21
10.88
4.45
3.36
2.57
0.89
13.71
49.60
7.81
12.62
4.82
3.90
2.79
1.03
14.76
56.90
8.41
14.48
5.19
4.47
1.18
15.82
64.65
9.01
16.45
5.56
5.08
3.21
1.34
16.87
72.86
9.61
18.54
5.93
5.73
3.43
1.51
17.93
81.52
10.22
20.75
6.30
6.41
3.64
1.69
18.98
90.62
23.06
6.67
7.12
3.86
1.88
11.42
25.49
7.04
7.87
4.07
2.07
12.02
28.03
7.42
8.66
4.28
2.28
33.44
8.16
10.33
4.71
2.72
14.42
39.29
8.90
12.14
3.20
15.02
42.38
9.27
13.09
5.36
3.45
15.62
45.57
9.64
14.08
5.57
16.83
52.27
10.38
16.15
6.00
4.25
18.03
59.40
11.12
18.35
6.43
4.83
19.23
66.94
11.86
20.68
6.86
5.44
12.61
23.13
7.28
6.09
12.98
24.41
7.50
13.35
25.72
7.71
6.77
14.09
28.43
8.14
7.48
14.83
31.26
8.57
8.23
15.57
34.22
9.00
16.31
37.29
9.43
9.82
16.68
38.88
9.69
10.24
17.06
40.49
9.86
10.66
17.80
43.81
10.28
11.54
47.26
10.71
12.44
11.78
14.84
12.85
17.44
13.93
20.23
15.00
23.20
16.07
26.36
17.14
29.71
18.21
33.24
19.28
36.95
