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Maybe more info would help. Customer wants to bring water from a well about 450' away with an estimated 10' head pressure. Well pump at 5gpm. They'll connect an outside hosebibb and about 12 outside misters using .5gph each (estimated).
Our timing is for Sh!t.
I just got sat back down and surrounded with comforts to watch olympic boob tube after putting the book back where it belongs.I'll look it up on my next piss stop in a couple few hours.
Ask Mark/Utah he's looking at it as we speak.
Why not call any well driller? This is their music, they're running this stuff every day.
I would think They'd be glad to help.
Already did that. They recommended starting off with 2" pipe and reducing at the end point. I call BS that this is too large and you're going to end up with no pressure & air space in the pipe at 5gpm. I could be wrong but want to get all the info. I don't think anyone should have to do things twice.
I have some books in the office Ill post the chart tommorrow morning when i get in to work! JC if you want PM ALL the details and ill figure out whatever you need! either that or give me a call in the AM ill be in the office about 7:30ish
PE is not on there but it is a great reference that you SHOULD have!! PE Hazen Sawyer coeefficient is 150 which means it is pretty much the same as HDPE which we use for storm design.
using 150 as its coefficient of friction:
f=4.52 Q ^1.85
f=friction loss (psi per ft) Q=rate of flow (gpm) C=Hazen Williams Coefficient d=internal pipe diameter
So using the above to solve for f
f=4.52 5GPM ^1.85
150^1.85 x 1 ^4.87
f=.0084 PSI loss per foot of pipe,
so at 450 feet of pipe our loss will be 3.76 psi loss our flow shoud remain the same and that is assuming 1" pipe
now ignoring the hose bib, simply because that will eat up pretty much all of your flow rate if it is opened full bore the "tax" on the system is .1GPM assuming you are right about the misters at .5GPH each... your total flow is negligable at .1GPM though the pipe, anything larger than 1" is overkill you can probably even get away with less, if you have a 30-50 pressure swith your pressure at the hose bib with ALL the misters on for the sprinkler system will be 46.24 at best and 26.24 at worst, so you may want to swap out the pressure switch to a 40-60 which will yeaild 56.24 and 36.24 similiarly
JC we are looking at less pressure loss, about 1 psi. I cant imagine much fluctuation as far as pump on and off because it is still a solid column of water and you still have bladder tank or atmospheric tank on the end, the 2" would be fine as well