Leadership

SMALL MAINS AND THEIR EFFICIENCY FOR FIRE SERVICE.

Issue 8 and Volume 30.

SMALL MAINS AND THEIR EFFICIENCY FOR FIRE SERVICE. [Several inquiries having been directed to the editor of this journal as to the effectiveness of fire streams under certain conditions, especially where large proportions of small mains predominate in distribution systems, some general information bearing on the subject is herewith given.] In the initial history of many waterworks, private and municipal, is found the common error of the use of small water mains. In some respects the use of these small mains is not considered an error from an engineering standpoint. Particularly is it argued that, where the system is a direct pumping one, it is a commercial advantage to expend money in burning coal for additional pump power to meet urgent conditions rather than to spend the money for large water mains. If a critical test is made on a number of plants thus constructed, the conditions may be sustained…

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