Digital Drip Designer

Friction Loss Factors

Christiansen F Factors

Lateral (or manifold) length, ft:
Emitter (or lateral) spacing, ft:

Number of emitters on lateral(laterals on manifold):		Back to lateral pressure losses Back to subunit flow/uniformity

Select friction factor from following table:

Number of Emitters	F factor
1	1.000
2	0.625
3	0.519
4	0.469
5	0.440
6	0.421
7	0.408
8	0.398
9	0.391
10	0.385
11	0.380
12	0.376
13	0.373
14	0.370
15	0.367
16	0.365
17	0.363
18	0.362
19	0.360
20	0.359
22	0.356
24	0.354
26	0.353
28	0.351
30	0.350
35	0.348
40	0.346
50	0.343
100	0.338
>100	0.333