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  #41  
Old 06-23-2013, 02:40 PM
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Mike Leary Mike Leary is online now
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Quote:
Originally Posted by Wet_Boots View Post
the metal shell on the riser does zip for the gear drive, just like it does zip for the actual connection of the nozzle turret, which breaks off as easily as it does on a PGP
So, why do so many guys have problems other than me? Clean living?
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  #42  
Old 06-23-2013, 03:07 PM
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Wet_Boots Wet_Boots is online now
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Meaning what? As long as you don't install the head so its top is below grade, you do well with an I-20. If you goof up the install, and the turret doesn't fully retract, it will break as easily as a PGP.
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  #43  
Old 06-23-2013, 04:40 PM
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Quote:
Originally Posted by Kiril View Post
The Hunter rep needs to read the specs on the head then.



Why don't you agree? Perhaps a math lesson?

http://water.me.vccs.edu/courses/CIV...son3b_math.htm

or maybe this will help.

http://www.ctgclean.com/tech-blog/20...e-which-is-it/
I don't he was basing his opinion on specs... just reality.

The second link was interesting. A local contractor uses a pressure reducer on all of their systems, which I guess is fine as long as the original zone layout is never tampered with. Wouldn't it be better to have higher pressure and use a valve with flow control for more flexibility down the road?
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  #44  
Old 06-23-2013, 05:17 PM
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Wet_Boots Wet_Boots is online now
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I think you can actually see more head leakage at low pressures on PGP heads, especially from the weep hole on the piston.
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  #45  
Old 06-23-2013, 08:32 PM
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grassman177 grassman177 is offline
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Quote:
Originally Posted by Mike Leary View Post
I know Boots thinks the guts are the same, but in 12 years, I've had zero problems with I-20 stainless 6".
i believe this might be worth looking into. next job, going that route for rotors.
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  #46  
Old 06-23-2013, 08:37 PM
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Quote:
Originally Posted by CAPT Stream Rotar View Post
the 70 psi static was ordered my my boss for the longer run of heads away from the POC.

the install was done yesterday so only time will tell on the pgp's.
this is why i wanted to install pressure regs at the first so many valves, and brought up doing it when asking about finding 50 psi inline cheap regulators that not all very long ago were available thru rainbird.

pressure reg down the first so many, and let friction losses etc take care of the longer runs.....................

On some other pgp notes, i really do like everything about the heads, except i have yet to find a RB5004 that leaks........
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  #47  
Old 06-23-2013, 08:54 PM
GreenLight GreenLight is offline
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The PGP is just a marginal head from top to bottom.. The 5000 has a far superior seal and now all of them have a slip clutch, those two features alone should all but eliminate the PGP from consideration on new installs.. That said, I do agree that the I-20 is far superior to both in my experience. I come across 10-15 year old I-20's that still run like a top.
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  #48  
Old 06-23-2013, 08:56 PM
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Quote:
Originally Posted by GreenLight View Post
The PGP is just a marginal head from top to bottom.. The 5000 has a far superior seal and now all of them have a slip clutch, those two features alone should all but eliminate the PGP from consideration on new installs.. That said, I do agree that the I-20 is far superior to both in my experience. I come across 10-15 year old I-20's that still run like a top.
and the 5000 blacktop is cheaper than a pgp... no brainer.
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  #49  
Old 06-23-2013, 09:10 PM
jbell36 jbell36 is offline
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so it sounds like when comparing the PGP to the 5000, the 5000 is the better head hands down...around here, 90% of heads are PGP's...would you guys start swapping out broken PGP's for 5000's or keep the system the same and just replace with another PGP when it needs to be replaced?

one thing i don't like about the i20's is how strong the spring is, takes a certain amount of pressure to even pop the head up...one side of town doesn't have very good pressure and can't pop the i20, yet the other side of town is more around 120 PSI...so as of right now, i don't really stock the i20, just have a few if and when i might need them...

i'm trying to figure out what i want to do in the future as far as maintenance goes on which head i should stock...
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  #50  
Old 06-23-2013, 09:12 PM
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Quote:
Originally Posted by jbell36 View Post
so it sounds like when comparing the PGP to the 5000, the 5000 is the better head hands down...around here, 90% of heads are PGP's...would you guys start swapping out broken PGP's for 5000's or keep the system the same and just replace with another PGP when it needs to be replaced?

one thing i don't like about the i20's is how strong the spring is, takes a certain amount of pressure to even pop the head up...one side of town doesn't have very good pressure and can't pop the i20, yet the other side of town is more around 120 PSI...so as of right now, i don't really stock the i20, just have a few if and when i might need them...

i'm trying to figure out what i want to do in the future as far as maintenance goes on which head i should stock...
rain bird 5000. I encounter the same thing everyday. Just because a part time irrigator/firefighter installed pgp's doesn't mean you have to accept his sh!tty standard.
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