Can you explain how to adjust for Hydraulic Low gradient? There is nothing on the Web. No one seems to know, and I think my adjustments are too much?
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Wayne Ammons
1/10/2019 08:39:37 am
I have never heard it expressed as gradient but I assume you are referring to changes in elevation. When performing hydraulic calculations for sprinkler systems, you account for changes in elevation between two points using the following formula:
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1/10/2019 10:43:58 am
Hydraulic Low Gradient (HLG) adjustments refer to modifying the available Water Supply at point of connection to reflect changes due to the lowest level of the resevoir (or tank) provided by the Water Purveyor.
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Michael Fertal
1/11/2019 11:18:56 am
Hydraulic Gradient is being used by Insurance Companies to evaluate existing systems. The evaluation is usually related to performance issues based on years of service of the systems and current conditions. Hydraulic Gradient is also used when modifying or additions to systems is taking place. Most Insurance Companies want a more accurate reading of the system performance at current time then as installed new.
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