For Each 10 Inches of Depth.
=========+=========
Diam. |
in Feet.| Gallons.
---------+---------
2 | 19.5
2½ | 30.6
3 | 44.06
3½ | 59.97
4 | 78.33
4½ | 99.14
5 | 122.40
5½ | 148.10
6 | 176.25
6½ | 206.85
7 | 239.88
7½ | 275.40
8 | 313.33
8½ | 353.72
9 | 396.56
9½ | 461.4
10 | 489.2
11 | 592.4
12 | 705.0
13 | 827.4
14 | 959.6
15 | 1101.6
20 | 1958.4
25 | 3059.9
---------+--------
The American Standard gallon contains 231 cubic
inches, or 8⅓ pounds of pure water. A cubic foot
contains 62.3 pounds of water, or 7.48 gallons.
Pressure per square inch is equal to the depth or
head in feet multiplied by .433. Each 27.72 inches
of depth gives a pressure of one pound to the square
inch.