Web Page - Ruth/Berry Service Manual Page 11

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FRICTION LOSS OF WATER PER 100 FEET OF GALVANIZED PIPE
Pipe
Size
1/2" 3/4" 1" 1-1/4" 1-1/2"   2"
U.S.
GAL.
PER
MIN.
LBS.
PRESS.
HEAD
LOSS
IN
FEET
LBS.
PRESS.
HEAD
LOSS
IN
FEET

LBS.
PRESS.
HEAD
LOSS
IN
FEET
LBS.
PRESS.
HEAD
LOSS
IN
FEET

LBS.
PRESS.
HEAD
LOSS
IN
FEET
LBS.
PRESS.
HEAD
LOSS
IN
FEET
2 3.20 7.4 .82 1.9 . . . . . . . .
4 11.69 27.0 3.3 7.0 .92 2.14 .25 .57 .09 .2 . .
6 24.68 57.0 6.36 14.7 1.97 4.55 .52 1.20 .22 .5 .09 .2
8 42.42 98.0 10.82 25.0 3.37 7.8 .87 2.0 .39 .9 .13 .3
10 63.64 147.0 16.45 38.0 5.06 11.7 1.30 3.0 .61 1.4 .22 .5
12 . . 22.94 53.0 7.09 16.4 1.86 4.3 .87 2.0 .30 .7
15 . . 34.63 80.0 10.82 25.0 2.81 6.5 1.30 3.0 .43 1.0
18 . . 46.84 108.2 15.15 35.0 3.94 9.1 1.82 4.2 .61 1.4
20 . . 58.87 136.0 18.18 42.0 4.81 11.1 2.25 5.2 .78 1.8
25 . . . . 27.70 64.0 7.19 16.6 3.16 7.3 1.17 2.7
30 . . . . 38.53 89.0 9.96 23.0 4.76 11.0 1.65 3.8
35 . . . . 51.52 119.0 13.51 31.2 6.36 14.7 2.21 5.1
40 . . . . 65.80 152.0 17.32 40.0 8.14 18.8 2.86 6.6
45 . . . . . . 21.65 50.0 10.04 23.2 3.55 8.2
50 . . . . . . 25.97 60.0 12.29 28.4 4.29 9.9

 
FRICTION LOSS OF WATER PER 100 FEET OF PLASTIC PIPE
Pipe
Size
1/2" 3/4" 1" 1-1/4" 1-1/2" 2"
U.S.
GAL.
PER
MIN.
LBS.
PRESS.
HEAD
LOSS
IN
FEET
LBS.
PRESS.
HEAD
LOSS
IN
FEET
LBS.
PRESS.
HEAD
LOSS
IN
FEET
LBS.
PRESS.
HEAD
LOSS
IN
FEET
LBS.
PRESS.
HEAD
LOSS
IN
FEET
LBS.
PRESS.
HEAD
LOSS
IN
FEET
1 .18 .43 . . . . . . . . . .
2
.66
1.54 .18 .40 .05 .12 .07 .18 . . . .
3 1.41 3.26 .36 .84 .11 .26 .18 .42 . . . .
5 3.63 8.40 .92 2.14 .28 .66 .27 .63 .03 .09 . .
8 8.65 20.03 2.20 5.09 .68 1.58 .38 .88 .08 .20 .02 .06
10 . . 3.33 7.70 1.03 2.38 .80
1.86
.12 .30 .03 .09
12 . . 4.32 10.00 1.44 3.34 .97 2.26 .18 .42 .10 .25
18 . . . . 3.06 7.07 1.48 3.43 .38 .88 .11 .28
20 . . . . 3.70 8.57 2.06 4.78 .46 1.07 .13 .32
25 . . . . 5.65 13.06 3.52 8.15 .69 1.60 .19 .46
30 . . . . . . 5.33 12.32 .97 2.26 .29 .67
40 . . . . . . . . 1.67 3.86 .45 1.04
50 . . . . . . . . 2.51 5.82 .74 1.73
60 . . . . . . . . 3.52 8.18 1.05 2.43