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Catalog 207 • Page 157
FRICTION LOSS
Equivalent Number Of Feet Straight Pipe For Different Fittings
Size of fittings, Inches
1⁄2" 3⁄4"
1" 1 1⁄4" 1 1⁄2" 2" 2 1⁄2" 3"
4"
5"
6"
8"
10"
90° Ell
1.5
2.0
2.7
3.5
4.3
5.5
6.5
8.0 10.0 14.0 15
20
25
45° Ell
0.8
1.0
1.3
1.7
2.0
2.5
3.0
3.8
5.0
6.3
7.1
9.4
12
Long Sweep Ell
1.0
1.4
1.7
2.3
2.7
3.5
4.2
5.2
7.0
9.0 11.0 14.0
Close Return Bend
3.6
5.0
6.0
8.3 10.0 13.0 15.0 18.0 24.0 31.0 37.0 39.0
Tee-Straight Run
1
2
2
3
3
4
5
Tee-Side Inlet or Outlet
3.3
4.5
5.7
7.6
9.0 12.0 14.0 17.0 22.0 27.0 31.0 40.0
or Pitless Adapter
Ball or Globe Valve Open
17.0 22.0 27.0 36.0 43.0 55.0 67.0 82.0 110.0 140.0 160.0 220.0
Angle Valve Open
8.4 12.0 15.0 18.0 22.0 28.0 33.0 42.0 58.0 70.0 83.0 110.0
Gate Valve-Fully Open
0.4
0.5
0.6
0.8
1.0
1.2
1.4
1.7
2.3
2.9
3.5
4.5
Check Valve (Swing)
4
5
7
9
11
13
16
20
26
33
39
52
65
In Line Check Valve (Spring)
4
6
8
12
14
19
23
32
43
58
or Foot Valve
Theoretical Discharge Of Nozzles In GPM
Head
Diamters of Nozzle in Inches
psi
1
/
16
1
/
8
3
/
16
1
/
4
3
/
8
1
/
2
5
/
8
3
/
4
7
/
8
1
1
1
/
8
1
1
/
4
1
3
/
8
10
38.6 0.37 1.48 3.32 5.91 13.3 23.6 36.9 53.1 72.4 94.5 120
148
179
15
47.25 0.45 1.81 4.06 7.24 16.3 28.9 45.2 65.0 88.5
116
147
181
219
20
54.55 0.52 2.09 4.69 8.35 18.8 33.4 52.2 75.1
102
134
169
209
253
25
61.0 0.58 2.34 5.25 9.34 21.0 37.3 58.3 84.0
114
149
189
234
283
30
66.85 0.64 2.56 5.75 10.2 23.0 40.9 63.9 92.0
125
164
207
256
309
35
72.2 0.69 2.77 6.21 11.1 24.8 44.2 69.0 99.5
135
177
224
277
334
40
77.2 0.74 2.96 6.64 11.8 26.6 47.3 73.8
106
145
188
239
296
357
45
81.8 0.78 3.13 7.03 12.5 28.2 50.1 78.2
113
153
200
253
313
379
50
86.25 0.83 3.30 7.41 13.2 29.7 52.8 82.5
119
162
211
267
330
399
55
90.5 0.87 3.46 7.77 13.8 31.1 55.3 86.4
125
169
221
280
346
418
60
94.5 0.90 3.62 8.12 14.5 32.5 57.8 90.4
130
177
231
293
362
438
65
98.3 0.94 3.77 8.45 15.1 33.8 60.2 94.0
136
184
241
305
376
455
70
102.1 0.98 3.91 8.78 15.7 35.2 62.5 97.7
141
191
250
317
391
473
75
105.7 1.01 4.05 9.08 16.2 36.4 64.7
101
146
198
259
327
404
489
80
109.1 1.05 4.18 9.39 16.7 37.6 66.8
104
150
205
267
338
418
505
85
112.5 1.08 4.31 9.67 17.3 38.8 68.9
108
155
211
276
349
431
521
90
115.8 1.11 4.43 9.95 17.7 39.9 70.8
111
160
217
284
359
443
536
95
119.0 1.14 4.56 10.2 18.2 41.0 72.8
114
164
223
292
369
456
551
100 122.0 1.17 4.67 10.5 18.2 41.1 74.7
117
168
229
299
378
467
565
105 125.0 1.20 4.79 10.8 19.2 43.1 76.5
120
172
234
306
388
479
579
110 128.0 1.23 4.90 11.0 19.6 44.1 78.4
122
176
240
314
397
490
593
115 130.9 1.25 5.01 11.2 20.0 45.1 80.1
125
180
245
320
406
501
606
120 133.7 1.28 5.12 11.5 20.5 46.0 81.8
128
184
251
327
414
512
619
130 139.1 1.33 5.33 12.0 21.3 48.0 85.2
133
192
261
341
432
533
645
140 144.3 1.38 5.53 12.4 22.1 49.8 88.4
138
199
271
354
448
553
668
150 149.5 1.43 5.72 12.9 22.9 51.6 91.5
143
206
280
366
463
572
692
175 161.4 1.55 6.18 13.9 24.7 55.6 98.8
154
222
302
395
500
618
747
200 172.6 1.65 6.61 14.8 26.4 59.5
106
165
238
323
423
535
660
799
250 193.0 1.85 7.39 16.6 29.6 66.5
118
185
266
362
473
598
739
894
300 211.2 2.02 8.08 18.2 32.4 72.8
129
202
291
396
517
655
808
977
Velocity
of disch.
ft/sec