Hydraulic Power vs. City Distribution.
IN ordinary systems of water distribution the pressure of water due to head, varying from fifty to seventy-five pounds per square inch, is considered efficient for domestic, fire and manufacturing purposes, but it is inefficient for hydraulic power purposes. It compels the use of larger hydraulic machinery, and what may be lacking in pressure in pounds per square inch for effective and rapid service, is partially compensated for by increasing the water piston area of the hydraulic engine.
Under these conditions large amounts of water are used at stated intervals. The factor of time is associated with the action of the water engine and, with ordinary pressure, the velocities are slow. The pressure is thus diverted for the time being from its original purposes in the district affected, and failure to maintain it equally in all parts of construction causes much trouble and inconvenience to water takers receiving water through small service pipes otherwise ample for their wants.
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