Friction Loss (PSI) and Water Velocity (Ft. per Second)

Friction (PSI) Loss & Water Velocity (Feet Per Second) Chart
0.00
0.01
0.01
0.01
0.02
0.02
0.03
0.04
0.04
0.05
0.07
0.09
0.11
0.13
0.16
0.19
0.22
0.25
0.29
0.38
0.49
0.60
0.73
0.88
1.03
1.19
1.37
1.56
1.75
1.96
2.18
2.41
2.65
3.16
3.72
4.31
4.94
5.62
6.33
7.08
7.87
8.70
9.57
11.90
14.47
17.26
0.20
0.26
0.33
0.40
0.46
0.53
0.60
0.66
0.73
0.80
0.93
1.07
1.20
1.33
1.47
1.60
1.74
1.87
2.00
2.34
2.67
3.01
3.34
3.68
4.01
4.35
4.68
5.01
5.35
5.68
6.02
6.35
6.69
7.36
8.03
8.70
9.37
10.03
10.70
11.37
12.04
12.71
13.38
15.05
16.73
18.40
0.00
0.01
0.01
0.01
0.01
0.01
0.02
0.02
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
0.13
0.17
0.21
0.26
0.30
0.36
0.41
0.48
0.54
0.61
0.68
0.76
0.84
0.92
1.10
1.29
1.50
1.72
1.98
2.20
2.46
2.74
3.02
3.33
4.14
5.03
6.00
7.05
8.17
9.38
10.65
12.01
13.43
14.93
0.21
0.26
0.30
0.34
0.39
0.43
0.47
0.52
0.60
0.69
0.78
0.86
0.95
1.04
1.12
1.21
1.30
1.51
1.73
1.95
2.16
2.38
2.60
2.81
3.03
3.25
3.46
3.68
3.90
4.11
4.33
4.76
5.20
5.63
6.06
6.50
6.93
7.36
7.80
8.23
8.66
9.75
10.83
11.92
13.00
14.08
15.17
16.25
17.33
18.42
19.50
NOTE: Shaded areas of chart indicate velocities over 5' per second. Use with Caution.
0.00
0.01
0.01
0.01
0.01
0.01
0.02
0.02
0.03
0.03
0.03
0.04
0.06
0.07
0.08
0.09
0.11
0.13
0.14
0.16
0.18
0.20
0.22
0.24
0.29
0.34
0.40
0.45
0.52
0.58
0.65
0.72
0.80
0.88
1.09
1.33
1.58
1.86
2.16
2.47
2.81
3.16
3.54
3.93
4.35
4.78
5.70
6.70
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75
0.88
1.00
1.13
1.25
1.38
1.51
1.63
1.76
1.88
2.01
2.13
2.26
2.39
2.51
2.76
3.02
3.27
3.52
3.77
4.02
4.27
4.53
4.78
5.03
5.66
6.29
6.92
7.55
8.18
8.81
9.43
10.06
10.69
11.32
11.95
12.58
13.84
15.10
0.00
0.01
0.01
0.01
0.01
0.01
0.01
0.02
0.02
0.02
0.02
0.03
0.03
0.03
0.04
0.05
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.15
0.18
0.22
0.25
0.29
0.34
0.38
0.43
0.48
0.54
0.59
0.65
0.78
0.91
0.38
0.44
0.49
0.55
0.61
0.66
0.72
0.77
0.83
0.88
0.94
0.99
1.05
1.10
1.22
1.33
1.44
1.55
1.66
1.77
1.88
1.99
2.10
2.21
2.49
2.77
3.05
3.32
3.60
3.88
4.15
4.43
4.71
4.99
5.26
5.54
6.10
6.65
Flow
GPM
Velocity
F.P.S.
PSI
Loss
6"
Velocity
F.P.S.
PSI
Loss
4”
Velocity
F.P.S.
3”
PSI
Loss
0.19
0.28
0.38
0.47
0.57
0.66
0.76
0.85
0.95
1.05
1.14
1.33
1.52
1.71
1.90
2.10
2.29
2.48
2.67
2.86
3.34
3.81
4.29
4.77
5.25
5.72
6.20
6.68
7.16
7.63
8.11
8.59
9.07
9.54
10.50
11.45
12.41
13.36
14.32
15.27
16.23
17.18
18.14
19.09
Velocity
F.P.S.
0.00
0.01
0.02
0.02
0.03
0.05
0.06
0.07
0.09
0.11
0.12
0.17
0.21
0.26
0.32
0.38
0.45
0.52
0.60
0.68
0.90
1.15
1.43
1.74
2.08
2.44
2.83
3.25
3.69
4.16
4.66
5.18
5.72
6.29
7.51
8.82
10.23
11.74
13.33
15.03
16.81
18.69
20.66
22.72
PSI
Loss
0.15
0.31
0.47
0.62
0.78
0.94
1.10
1.25
1.41
1.57
1.73
1.88
2.20
2.51
2.83
3.14
3.46
3.77
4.09
4.40
4.72
5.50
6.29
7.08
7.87
8.65
9.44
10.23
11.01
11.80
12.59
13.37
14.16
14.95
15.74
17.31
18.88
21/2”
Velocity
F.P.S.
0.00
0.02
0.03
0.05
0.08
0.12
0.15
0.20
0.25
0.30
0.36
0.42
0.56
0.71
0.89
1.08
1.29
1.51
1.75
2.01
2.28
3.04
3.89
4.84
5.88
7.01
8.24
9.56
10.96
12.46
14.04
15.71
17.46
19.30
21.22
25.32
29.75
2”
PSI
Loss
Velocity
F.P.S.
0.37 0.01 0.21
0.74 0.03 0.42
1.11 0.07 0.64
1.48 0.12 0.85
1.85 0.18 1.07
2.22 0.25 1.28
2.59 0.33 1.49
2.96 0.42 1.71
3.33 0.52 1.92
3.70 0.63 2.14
4.07 0.75 2.35
4.44 0.89 2.57
5.19 1.18 2.99
5.93 1.51 3.42
6.67 1.88 3.85
7.41 2.28 4.28
8.15 2.72 4.71
8.89 3.20 5.14
9.64 3.17 5.57
10.38 4.25 5.99
11.12 4.83 6.42
12.97 6.43 7.49
14.83 8.23 8.56
16.68 10.24 9.64
18.53 12.45 10.71
14.85 11.78
17.45 12.85
20.23 13.92
23.21 14.99
26.37 16.06
29.72 17.13
33.26 18.21
36.97 19.28
11/2”
PSI
Loss
0.03
0.12
0.26
0.44
0.66
0.93
1.24
1.59
1.97
2.40
2.86
3.36
4.47
5.73
7.13
8.66
10.33
12.14
14.08
16.15
18.35
24.42
31.27
38.89
47.27
Velocity
F.P.S.
0.60
1.20
1.80
2.40
3.00
3.60
4.20
4.80
5.40
6.00
6.60
7.21
8.41
9.61
10.81
12.01
13.21
14.42
15.62
16.82
18.02
11/4”
PSI
Loss
0.11
0.39
0.84
1.42
2.15
3.02
4.01
5.14
6.39
7.77
9.27
10.89
14.48
18.55
23.07
28.04
33.45
39.30
45.58
52.28
59.41
1”
Velocity
F.P.S.
0.43
1.55
3.28
5.60
8.56
11.86
15.77
20.20
25.12
30.54
36.43
42.80
56.94
72.92
90.69
110.23
PVC Sch 40 Pipe (Loss in PSI Per 100 ft of Pipe)
PSI
Loss
Velocity
F.P.S.
0.32
1.14
2.42
4.13
6.24
8.75
11.64
14.90
18.54
22.53
26.88
31.58
42.01
53.80
66.92
81.34
Velocity
F.P.S.
PSI
Loss
1
2
3
4
5
6
7
8
9
10
11
12
14
16
18
20
22
24
26
28
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
110
120
130
140
150
160
170
180
190
200
225
250
275
300
325
350
375
400
425
450
475
500
550
600
3/4”
PSI
Loss
Flow
GPM
1/2”
1
2
3
4
5
6
7
8
9
10
11
12
14
16
18
20
22
24
26
28
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
110
120
130
140
150
160
170
180
190
200
225
250
275
300
325
350
375
400
425
450
475
500
550
600