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Old 10-04-2013, 07:50 PM
jbell36 jbell36 is offline
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Who uses POLY for main line?

just as the title says...curious on others' installation techniques
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  #2  
Old 10-04-2013, 08:31 PM
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greenmonster304 greenmonster304 is online now
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I use it on systems under 2". 2" and bigger is PVC
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Old 10-04-2013, 08:46 PM
jbell36 jbell36 is offline
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yes, should clarify that, strictly 1" systems...and what were your techniques, mandatory master valve? 80 psi poly? 160 psi poly? pressure regulator on the system? etc...
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Old 10-04-2013, 09:40 PM
Without A Drought Without A Drought is online now
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ive installed poly mains behind a master valve up to 1.5" and i have a few service accounts with 2" poly mains.

i very rarely have a problem with any of them
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  #5  
Old 10-04-2013, 09:55 PM
jbell36 jbell36 is offline
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i'm considering going to poly mains, with master valves, but i have heard negative things about them...there are a few companies around here that do it, but none that are very representable companies, and this is one of the reasons why i'm hesitant...but i have talked to others who say they do it and have no problems and put in good systems...my point is, poly is SOOO much easier and quicker, so why not...my supplier is more or less telling me to stick with PVC mains, but he was brought up on PVC and has that old school mentality...my thoughts are, if you are trenching, use PVC, if you are pulling, use poly
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Old 10-05-2013, 02:42 AM
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Wet_Boots Wet_Boots is online now
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A poly mainline is not to be considered without a master valve. Whether it is a better grade of poly than you employ for zones has to do with the supply pressure. It isn't a ruinous expense to upgrade to 125 psi NSF-rated tubing for a mainline, but I haven't done it unless the supply pressure exceeded 100 psi. The reasoning for an upgrade is the possibility that the mainline will be subjected to continuous supply pressure.

If you aren't in true poly territory, you might have concerns with the fitness of your local supply of poly for mainline duty, in which case, you only employ NSF-rated tubing for that task.
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Old 10-05-2013, 06:13 AM
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mitchgo mitchgo is offline
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We pull 200 / 250 psi Poly Mains .. Typically 1" and bump it to 1.25" when needed.

PVC Manifolds

100 psi 1" laterals
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Old 10-05-2013, 06:14 AM
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mitchgo mitchgo is offline
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Quote:
Originally Posted by Wet_Boots View Post
If you aren't in true poly territory, you might have concerns with the fitness of your local supply of poly for mainline duty, in which case, you only employ NSF-rated tubing for that task.
I went to our local Ewing and asked if they sold blazzing saddles. The guy didn't know what they were .. So I found them in HIS store. He's like .. I've been here for 3 years and have never seen this sold.
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Old 10-05-2013, 07:37 AM
ArTurf ArTurf is online now
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Quote:
Originally Posted by Wet_Boots View Post
A poly mainline is not to be considered without a master valve. Whether it is a better grade of poly than you employ for zones has to do with the supply pressure. It isn't a ruinous expense to upgrade to 125 psi NSF-rated tubing for a mainline, but I haven't done it unless the supply pressure exceeded 100 psi. The reasoning for an upgrade is the possibility that the mainline will be subjected to continuous supply pressure.

If you aren't in true poly territory, you might have concerns with the fitness of your local supply of poly for mainline duty, in which case, you only employ NSF-rated tubing for that task.
I'm in the deep south and I've never seen poly used but I'm curious. When you say "true poly territory" at what point north do you consider poly country?
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Old 10-05-2013, 08:47 AM
jbell36 jbell36 is offline
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Quote:
Originally Posted by ArTurf View Post
I'm in the deep south and I've never seen poly used but I'm curious. When you say "true poly territory" at what point north do you consider poly country?
if you drew an imaginary line (horizontally of course) across the US almost directly in the middle, say the Kansas/Oklahoma border, then everything North is mainly pulling poly, and everything South is trenching PVC

just a rule of thumb...some companies will only install one or the other no matter where they are...i know the Northeast in particular uses a lot of poly
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