Leaky seals: PGP vs 5004

Discussion in 'Irrigation' started by WalkGood, Aug 10, 2011.

  1. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    And stronger spring, so on low pressure applications this is a problem. I have one system we take care of, and every year when I turn start it up, I have to use the flow control on the heads to get all the others to pop up. Even throughout the summer the heads do not always pop up.
     
  2. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,153

    That is a concern , and another reason I havnt gone that route. Biggest reason thou is no matter what I use I still need pgp,s , so I figure Ill just use them.
     
  3. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,603

    Prolly got a few hundred I-20 6" stainless ultras in service, problem zero.
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,449

    Same gears and seals (I believe) as a PGP - put some 1/2 gpm nozzles in some of them and watch them awhile.
     
  5. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,153

    I dont have a lot of I-20,s out there, but Ive yet to see one with a leaking seal.
     
  6. bcg

    bcg LawnSite Bronze Member
    from Tx
    Posts: 1,836

    I hardly ever run into I-20's but I've replaced a couple this year because of leaky seals. I had a long discussion about this problem with my Hunter rep at a party a couple of months ago and he insisted that I see more failed Hunter heads because there are more Hunter heads installed than anyone else. I guess that could be but I know that I've had more than a few systems where I've replaced every rotor on them because over 90% of the PGPs were leaking at the wiper seal or threads and I went 5004's in every case because I've never personally seen the same problem in a system with T-Birds (the fixed version) or 5000's. I've also never seen a 5000 launch the turret off the head like I do with PGP's so my feeling is that they 5000's are just more reliable and durable heads and I do like the pattern of the rain curtain nozzles better. I've never had a need to go below 1.0GPM on a rotor so the extras on the PGP tree really don't do me any good. Most of the time when I'm replacing a PGP, it's been nozzled with # 6 or 7 with #9 being a close 3rd.
     
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,449

    I've replaced a few - they break as easy as a PGP, if they aren't retracted.
     
  8. CAPT Stream Rotar

    CAPT Stream Rotar LawnSite Fanatic
    Posts: 5,857

    I've noticed pgp's on higher than 30 Psi pressure systems fail eaiser..


    anyone else?
     
  9. WalkGood

    WalkGood LawnSite Bronze Member
    Posts: 1,910

    What size nozzles at 30psi? Is that static or dynamic pressure?

    Even at 30 psi dynamic pressure, gotta nozzle down to get any decent distance with 4 heads.
     
  10. hunterpreferred

    hunterpreferred LawnSite Member
    Posts: 179

    We have installed over 2000 I20's this season. Never had leaky seals. A few do not rotate right out of the box. The other problem is as Dana mentioned, not always popping up with low psi. Removing the check valve helps, but is not always an option.
     

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