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Old 07-01-2012, 11:18 AM   #1
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water pressure

Hi there if i am wanting to run a water line to the roof on a flat top commerial building and have a 1/2 " type line to work with am i doing a fair job with water pressure to stay with that size line? I am giong to try to run a sprinkler system to cool the roof down. I do have a big area to cover and am going to need atleast two garden sprinklers up there. Question is should i step up line size to help keep pressure and/or am i giong to lose pressure any how just because I'm going 24' above ground and need something different.


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Old 07-01-2012, 11:44 AM   #2
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Why don't you hang a garden hose over the side and do a test run? Hook it to a hose bib and see if it's satisfactory?


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Old 07-01-2012, 11:53 AM   #3
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You lose one pound of pressure for every thirty inches of rise in elevation. Attempt to use two sprinklers if flow is enough step up line size.

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Old 07-01-2012, 12:20 PM   #4
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consider just filling the roof with water 6"-12" deep then just let the sun evaoprate the water that will temper the building as the water evaps what state you in?
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