Answers are grounded in this paper and cite their sources.
This article discusses different causes of main breaks including inadequate design, improper installation, surge or water hammer, soil movement, internal corrosion, external corrosion, temperature differential, manufacturing defects, impact, or a combination of any the above. There are 40 known types of corrosion, with the combination of soil movement and corrosion being the major cause of main failure. Most breaks can be prevented by proper design, installation, and protection from corrosion and expansive clay.
No takes yet. Share an insight, caveat, or question.
R. E. Morris (1967) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: