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In a day when the green movement and sustainability have become priorities, the use of hydraulic calculations is more important than ever. Reducing pipe sizes saves materials and the energy needed to produce those materials. While the savings are usually not enough to justify the inclusion of a pump where not otherwise needed, hydraulic calculations are almost always economical in situations where a pump is to be provided anyway.
Much of the world still uses pipe schedule systems, where each pipe size is permitted to serve a specific number of downstream sprinklers. For example, the original 1896 edition of what is now
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