Ok, I need a little help and wanted to ask the GS. We have a pivot well that has a 10 inch pipe, ran to a pivot, necked down to a 8inch pipe. We are wanting to run a pipe about 4,000 ft at 1000g/m, we want to know if an 80psi, 8 inch PVC pipe would work, was told we might have to go up to 10inch, but that is twice the expense. Any help would be appreciated. Also, anyone have any type of pipe for sale that would reach for water transport, let me know. Thanks in advance!
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And if anyone has any pipe, willing to trade for a hunt.
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You need to find a.friction loss formula to figure that out. No way you will get 80psi in and 80psi out. Had all those formulas memorized 40 years ago.Comment
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You'll be at 6.38 fps and lose 50 psi through an 8"
4.08 fps and only 17.8 psi of pressure drop in a 10"
Around these parts 10" isn't double the cost of an 8", though 10" is much less common than 8" or 12" when it comes to potable water.Comment
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You will have 105 ft of head loss, 6.38 fps as above is the same my civil eng student came up with but he is working on the max gpm. No way i can do that math, lol glad he got his moms genes.Comment
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You look at HDPE pipe not sure how the cost compares to PVCComment
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Ok he reworked some numbers and thinks the psi will be close to 100psi, for the 8" pipe he just finished fluids so he is unsure of his calcs but gave it a shot.Comment
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what starting pressure, what pressure gpm do you need at the end of the 4'k feet elevationchanges?Comment
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Ok, I'm asking for a friend so I had to get more details from him. When he turns the sprinklers on to the 1200' pivot, 8 inch pipe, the pressure reads 35psi. We have 5, 2 inch poly pipe at 4,000', when we cut the valve off at the sprinklers, the pressure significantly goes up, never ran it past 60 psi because we were afraid of too much back pressure. Thanks for all the feed back, really appreciate it.Comment
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Asking for help again, brining it to the top.
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