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Every Thing Else Board
Running a new water line-need help in sizing it.
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<blockquote data-quote="bear" data-source="post: 633153" data-attributes="member: 5779"><p>Everything is based on starting pressure at the main. 60 psi is not alot to start with on a 3,000ft. service line. Where we are, the main pressure is about 125 psi. You can run long distances with smaller supply pipe. </p><p></p><p>At 60 psi starting pressure, the problem will be when you get to the house. Depending on how long the runs are in the house and how long the lines are going to the yard hydrants. Friction loss will build up quickly in those smaller lines. </p><p></p><p>When you hook that garden hose up at the end of that 1 1/2" service, pressure will not be more. You will have increased velocity with the smaller line but the pressure will be the same, and if the hose is very long the pressure will be less.</p><p></p><p>Increased velocity sometimes gives us a false sense of higher pressure but the volume that can actually be acquired through smaller line and increased velocity is less.</p><p></p><p>You can fill a 5 gallon bucket alot quicker with a hose and no spray nozzel than you can with a spray nozzel adjusted to high velocity spray stream.</p><p></p><p>There is nothing cheap about running any size line 3000ft. and you usually only have one chance to do it right.</p><p></p><p>The physical characteristics that allowed 2000ft. to work may be totally different than this situation. Every piece of ground is a little different.</p><p></p><p>Yes, a well may be cheaper</p><p></p><p>Bear</p></blockquote><p></p>
[QUOTE="bear, post: 633153, member: 5779"] Everything is based on starting pressure at the main. 60 psi is not alot to start with on a 3,000ft. service line. Where we are, the main pressure is about 125 psi. You can run long distances with smaller supply pipe. At 60 psi starting pressure, the problem will be when you get to the house. Depending on how long the runs are in the house and how long the lines are going to the yard hydrants. Friction loss will build up quickly in those smaller lines. When you hook that garden hose up at the end of that 1 1/2" service, pressure will not be more. You will have increased velocity with the smaller line but the pressure will be the same, and if the hose is very long the pressure will be less. Increased velocity sometimes gives us a false sense of higher pressure but the volume that can actually be acquired through smaller line and increased velocity is less. You can fill a 5 gallon bucket alot quicker with a hose and no spray nozzel than you can with a spray nozzel adjusted to high velocity spray stream. There is nothing cheap about running any size line 3000ft. and you usually only have one chance to do it right. The physical characteristics that allowed 2000ft. to work may be totally different than this situation. Every piece of ground is a little different. Yes, a well may be cheaper Bear [/QUOTE]
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Running a new water line-need help in sizing it.
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