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Water-to-Water System Design Guide
Part III: Source Side Design / Closed Loop Installation Guidelines
Table 3-3d: Polyethylene Pressure Drop per 100ft of Pipe
No Antifreeze (50°F [10°C] EWT): Water
3/4" IPS SDR11
Flow
Vel
Rate
PD (ft)
(ft/s)
1
0.23
0.55
2
0.78
1.10
3
1.59
1.66
4
2.62
2.21
5
3.88
2.76
6
5.34
3.31
7
6.99
3.87
8
8.83
4.42
9
10.85
4.97
10
13.05
5.52
11
15.41
6.08
12
17.95
6.63
13
0.00
0.00
14
0.00
0.00
15
0.00
0.00
16
0.00
0.00
17
0.00
0.00
18
0.00
0.00
19
0.00
0.00
20
0.00
0.00
21
0.00
0.00
22
0.00
0.00
23
0.00
0.00
24
0.00
0.00
25
0.00
0.00
26
0.00
0.00
28
0.00
0.00
30
0.00
0.00
32
0.00
0.00
34
0.00
0.00
36
0.00
0.00
38
0.00
0.00
40
0.00
0.00
42
0.00
0.00
44
0.00
0.00
46
0.00
0.00
48
0.00
0.00
50
0.00
0.00
50
1" IPS SDR11
Vel
Re
PD (ft)
Re
(ft/s)
6760
0.08
0.35
5387
13520
0.27
0.70
10774
20402
0.54
1.06
16315
27162
0.90
1.41
21703
33922
1.33
1.76
27090
40682
1.83
2.11
32477
47565
2.40
2.47
38018
54325
3.03
2.82
43405
61085
3.73
3.17
48792
67844
4.48
3.52
54179
74727
5.30
3.87
59567
81487
6.16
4.23
65108
0
7.09
4.58
70495
0
8.07
4.93
75882
0
9.11
5.28
81269
0
10.20
5.64
86810
0
11.34
5.99
92197
0
12.53
6.34
97585
0
13.78
6.69
102972
0
15.07
7.04
108359
0
16.41
7.40
113900
0
17.80
7.75
119287
0
19.25
8.10
124674
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
0
0.00
0.00
0
Bryant: Whatever It Takes.
1-1/4" IPS SCH40
1-1/2" IPS SCH40
Vel
PD (ft)
Re
PD (ft)
(ft/s)
0.02
0.21
4142
0.01
0.08
0.43
8481
0.04
0.17
0.64
12622
0.08
0.28
0.86
16961
0.13
0.41
1.07
21103
0.20
0.56
1.29
25442
0.27
0.74
1.50
29583
0.36
0.93
1.72
33922
0.45
1.15
1.93
38064
0.55
1.38
2.15
42403
0.66
1.63
2.36
46544
0.78
1.90
2.57
50686
0.91
2.18
2.79
55025
1.05
2.49
3.00
59167
1.20
2.81
3.22
63505
1.35
3.14
3.43
67647
1.51
3.49
3.65
71986
1.68
3.86
3.86
76128
1.86
4.24
4.08
80467
2.04
4.64
4.29
84608
2.23
5.06
4.50
88750
2.43
5.48
4.72
93089
2.64
5.93
4.93
97230
2.85
6.39
5.15
101569
3.07
6.86
5.36
105711
3.30
7.35
5.58
110050
3.53
8.36
6.01
118530
4.02
9.44
6.44
127011
4.54
10.57
6.86
135294
5.08
11.75
7.29
143775
5.65
12.99
7.72
152255
6.24
14.27
8.15
160736
6.86
15.61
8.58
169216
7.51
17.01
9.01
177697
8.18
18.45
9.44
186178
8.87
19.94
9.87
194658
9.59
0.00
0.00
0
10.33
0.00
0.00
0
11.09
2" IPS SCH40
Vel
Vel
Re
PD (ft)
(ft/s)
(ft/s)
0.16
3681
0.00
0.10
0.32
7363
0.01
0.19
0.47
10814
0.02
0.29
0.63
14496
0.04
0.38
0.79
18177
0.06
0.48
0.95
21859
0.08
0.57
1.10
25310
0.11
0.67
1.26
28992
0.14
0.76
1.42
32673
0.17
0.86
1.58
36355
0.20
0.96
1.73
39806
0.24
1.05
1.89
43487
0.28
1.15
2.05
47169
0.32
1.24
2.21
50850
0.36
1.34
2.36
54302
0.41
1.43
2.52
57983
0.46
1.53
2.68
61665
0.51
1.63
2.84
65346
0.57
1.72
2.99
68798
0.62
1.82
3.15
72479
0.68
1.91
3.31
76161
0.74
2.01
3.47
79842
0.81
2.10
3.62
83293
0.87
2.20
3.78
86975
0.94
2.29
3.94
90656
1.01
2.39
4.10
94338
1.08
2.49
4.41
101471
1.23
2.68
4.73
108834
1.38
2.87
5.04
115967
1.55
3.06
5.36
123330
1.72
3.25
5.67
130462
1.91
3.44
5.99
137825
2.10
3.63
6.30
144958
2.29
3.82
6.62
152321
2.49
4.02
6.93
159454
2.71
4.21
7.25
166817
2.93
4.40
7.57
174180
3.15
4.59
7.88
181313
3.39
4.78
Re
2954
5613
8567
11225
14179
16838
19792
22451
25405
28359
31017
33971
36630
39584
42243
45197
48151
50810
53764
56422
59376
62035
64989
67648
70602
73556
79168
84781
90394
96006
101619
107232
112844
118753
124365
129978
135591
141203
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