|=25.1=|=27.3=|=29.5=|=32.0=| =34.5=| =37.1=| =40.0=| =43.0=| =58.0=| =75.0=| =95.0=|=116.= |
7" | 73.7 | 76.9 | 80.2 | 83.3 | 86.6 | 89.8 | 93.0 | 96.2 | 112 | 128 | 145 | 161 |
|=20.0=|=22.5=|=24.9=|=27.0=| =28.8=| =30.6=| =32.8=| =35.5=| =47.5=| =61.2=| =78.6=| =95.1=|
8" | 96.3 |101 |105 |109 | 113 | 117 | 121 | 125 | 146 | 168 | 189 | 210 |
|=17.1=|=19.2=|=21.0=|=22.9=| =24.6=| =26.2=| =28.0=| =30.1=| =40.1=| =52.1=| =66.6=| =82.0=|
9" |122 |127 |132 |138 | 143 | 148 | 154 | 159 | 185 | 212 | 238 | 265 |
|=14.8=|=16.7=|=17.9=|=19.9=| =21.0=| =22.7=| =24.3=| =25.9=| =34.8=| =45.9=| =58.0=| =70.1=|
10" |150 |157 |163 |170 | 177 | 183 | 190 | 196 | 229 | 261 | 295 | 327 |
|=13.0=|=14.7=|=15.9=|=17.1=| =18.2=| =20.1=| =21.3=| =22.6=| =30.7=| =40.0=| =50.8=| =62.0=|
11" |182 |190 |198 |206 | 214 | 222 | 229 | 237 | 277 | 316 | 356 | 396 |
|=11.6=|=13.0=|=14.0=|=15.1=| =16.1=| =17.8=| =19.1=| =20.2=| =27.1=| =35.9=| =45.4=| =55.9=|
12" |217 |226 |235 |245 | 254 | 264 | 273 | 283 | 330 | 377 | 425 | 472 |
--------+---------+----------+------+-------+-------+-------+-------+-------+-------+-------+-------+

EXAMPLE

Assume the surveyed head as 240 feet, the water quantity as 207
cubic feet per minute and a pipe line 12 inches in diameter 900 feet
long. To ascertain the friction loss, refer to column of pipe
diameter and follow across the column for 12 inches diameter to the
quantity, 207 cubic feet per minute. The heavy-faced figures above
207 indicate that the loss per 1000 feet of pipe length is 11 feet.
Therefore, since the pipe in the example is 900 feet long, the loss
will be

11.' x 900/1000 or 9.9 feet, and the effective head will be
240' - 9.9' = 230.1'

Steel tubing for supply pipes, from 3 to 12 inches in diameter is
listed at from 20 cents to $1.50 a foot, according to the diameter and
thickness of the material. Discounts on these prices will vary from 25
to 50 per cent. The farmer can cut down the cost of this pipe by
conveying his supply water from its natural source to a pond, by means
of an open race, or a wooden flume. An ingenious mechanic can even
construct his own pipe out of wood, though figuring labor and
materials, it is doubtful if anything would be saved ove