71.   The best way to prevent water hammer is to make sure that the return pipes are inclined toward the boiler.

72.   The burst pipe is the latest in a long-running series of construction problems at Co-op City.

73.   The cable pipe largely is unused during the daytime when people are at work.

74.   The Canadian pipes are similar to those in the great diamond-producing regions of South Africa, Botswana, Russia and Australia.

75.   The banging is worse if some pipes are slightly loose in their mounting brackets.

76.   The gas pipes were on fire.

77.   The intake pipes are not deep enough to draw water from the cold lake bottom.

78.   The lead pipes were, of course, toxic, and many homeowners died from drinking the water.

79.   The pipe was a vent for odors.

80.   The pipe was too far below the earth to be a danger, but Incident Commander John Pearson worried heavy smoke might ground out nearby power lines.