[REPAIRING LEAKS IN PIPES AND TANKS]
Leaks in pipes usually result from corrosion or from damage to the pipe. Pipes may be damaged by freezing, by vibration caused by machinery operating nearby, by water hammer, or by animals bumping into the pipe. (Water hammer is discussed on P. 8)
Figure 5.—Protected wall hydrant suitable for filling agricultural sprayers.
Corrosion
Occasionally waters are encountered that corrode metal pipe and tubing. (Some acid soils also corrode metal pipe and tubing.)
The corrosion usually occurs, in varying degrees, along the entire length of pipe rather than at some particular point. An exception would be where dissimilar metals, such as copper and steel, are joined.