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Old 08-13-2010, 10:38 PM
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PerfiCut L&L PerfiCut L&L is offline
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Poly questions

I hear a lot about how effecient poly is to install, so were going to try it on our next install but I have a couple questions.

What kind of reel holder or other method have you found to be efficient when pulling this stuff?

Secondly, the friction loss chart I have on this poly 80 psi product says 1" tops out at 12gpm at 4.45fps. Is this right? S Sure limits the amount of rotors running on a single zone doesnt it?
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Old 08-13-2010, 10:49 PM
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have a guy un roll the pipe..

Use inch and a quarter and then T to 1 inch..

either way how many rotors you getting off 12 gpm?
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Old 08-14-2010, 02:36 AM
WalkGood WalkGood is offline
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I'd only use 100 psi poly at one inch, as a minimum. The *safe* range is 12 to 14 gpm.

What size water meter and supply pipe from that meter?
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Old 08-14-2010, 07:08 AM
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I could have sworn 1" poly carrys about 3 gpm more then a 1" valve will pass, no?
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Old 08-14-2010, 07:23 AM
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we have put 18 gpm through 1 inch poly..

yes there was hammer.
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Old 08-14-2010, 07:50 AM
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Dont have charts here or the desire to go hunting but I thought poly carries 21 and a 1" valve will pass 18
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Old 08-14-2010, 07:51 AM
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BTW cappy , sorry to hear about the misses.Keep ya chin up, or down , depending on the activity.
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Old 08-14-2010, 12:21 PM
WalkGood WalkGood is offline
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One inch poly *will* carry much higher gpm, but things will be screaming like a banchee and hammering like a truck hit the house. That is, if you have the volume and pressure available for it to work properly.

But why push it?

At a typical residential site around here, 5 rotaries max on 1 zone of 1 inch poly is 99% of the time all you need. Maybe 6 if there are many 1/4 turns and/or smaller nozzles.

Sure, there are many residential sites with more heads on 1 inch poly.

If available pressure and volume drop in the future, then all those heads will just be spitting.
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Old 08-14-2010, 12:45 PM
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I have one system where a section of one-inch poly carries almost fifty - count 'em - fifty gpm. Of course, no valves are downstream of the section, which passes underneath a walk and a raised bed.
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Old 08-14-2010, 01:59 PM
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Does the sidewalk vibrate like a bed at the Commack Motor Inn?

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