PRESSURE DROP IN WATER HOSE

Users of these tables are cautioned that the information in the following tables is intended for general reference and general applicability only, and should not be relied upon as the sole or precise source of information available with respect to the subject covered. The user should also refer to and follow manufacturers' specific instructions and recommendations with regard to such information, where they exist.

This table shows the friction loss in water hose in pounds per square inch per 100 foot length, for straight, smooth bore hose.

Note: Friction loss can vary by up to 20% due to temperature. Bends can increase friction loss by 50%.


Table 1 - =" through 2=" ID Hose
Flow of Water in GPM Actual Inside Diameter in Inches
=" >" 1" 1<" 1=" 2" 2="
1 1.41 - - - - - -
2 5.09 0.71 - - - - -
5 27.7 3.85 0.95 0.32 0.13 - -
10 100 13.9 3.42 1.15 0.47 0.12 -
15 - 29.4 7.24 2.44 1.00 0.25 0.08
20 - 50.0 12.3 4.16 1.71 0.42 0.14
25 - 75.6 18.6 6.28 2.59 0.64 0.21
30 - 106 26.1 8.80 3.62 0.89 0.30
35 - 141 34.7 11.7 4.82 1.19 0.40
40 - - 44.4 15.0 6.17 1.52 0.51
45 - - 55.3 18.6 7.67 1.89 0.64
50 - - 67.1 22.7 9.32 2.30 0.77
60 - - 94.1 31.7 13.1 3.22 1.09
70 - - 125 42.2 17.4 4.28 1.44
80 - - - 54.0 22.2 5.48 1.85
90 - - - 67.2 27.7 6.81 2.30
100 - - - 81.7 33.6 8.28 2.79
125 - - - 123 50.8 12.5 4.22
150 - - - - 71.1 17.5 5.91
175 - - - - 94.6 23.3 7.86
200 - - - - 121 29.8 10.1
225 - - - - - 37.1 12.5
250 - - - - - 45.1 15.2
275 - - - - - 53.8 18.1
300 - - - - - 63.2 21.3
350 - - - - - 84.0 28.3
400 - - - - - 108 36.3
450 - - - - - - 45.1
500 - - - - - - 54.8
600 - - - - - - 76.8
700 - - - - - - 102
800 - - - - - - 131
1000 - - - - - - -


Table 2 - 3" through 12" ID Hose
Flow of Water in GPM Actual Inside Diameter in Inches
3" 4" 5" 6" 8" 10" 12"
25 - - - - - - -
30 0.12 - - - - - -
35 0.16 - - - - - -
40 0.21 - - - - - -
45 0.26 - - - - - -
50 0.32 - - - - - -
60 0.45 - - - - - -
70 0.59 - - - - - -
80 0.76 - - - - - -
90 0.95 0.23 - - - - -
100 1.15 0.28 - - - - -
125 1.74 0.43 - - - - -
150 2.43 0.60 0.20 - - - -
175 3.24 0.80 0.27 - - - -
200 4.14 1.02 0.34 - - - -
225 5.15 1.27 0.43 - - - -
250 6.26 1.54 0.52 - - - -
275 7.47 1.84 0.62 - - - -
300 8.77 2.16 0.73 0.30 - - -
350 11.7 2.87 0.97 0.40 - - -
400 14.9 3.68 1.24 0.51 - - -
450 18.6 4.57 1.54 0.64 - - -
500 22.6 5.56 1.88 0.77 0.19 - -
600 31.6 7.79 2.63 1.08 0.27 - -
700 42.1 10.4 3.49 1.44 0.35 0.12 -
800 53.8 13.3 4.47 1.84 0.45 0.15 -
1000 81.4 20.0 6.76 2.78 0.69 0.23 0.10
1200 114 28.1 9.47 3.90 0.96 0.32 0.13
1400 152 37.3 12.6 5.18 1.28 0.43 0.18
1600 - 47.8 16.1 6.64 1.64 0.55 0.23
1800 - 59.5 20.0 8.25 2.03 0.69 0.28
2000 - 72.2 24.4 10.0 2.47 0.83 0.34
2500 - - 36.8 15.2 3.73 1.26 0.52
3000 - -- 51.6 21.2 5.23 1.76 0.73

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