Rotor Heads Exposed

Discussion in 'Irrigation / Sprinkler Forum' started by vaman, Apr 13, 2010.

  1. vaman

    vaman New Member

    Messages:
    41
    Location:
    NJ
    Last fall I replaced all of the Hunter rotor heads on my system. Despite filling the dirt back in, some of the heads remain exposed above the ground. Attaching them to the supply line was straightforward and I can tell that they are perpendicular to the supply line.The most obvious one is about 1/2 " above. Anyone else had this happen and if so what is the solution?:confused:
  2. Fireguy97

    Fireguy97 Irrigation Contractor

    When you say that, "They are perpendicular to the supply line", does that men that they are attached to the supply line with a tee fitting that is vertical and connected to the head with a nipple, or connected to the supply line with a swing joint?

    Mick
  3. vaman

    vaman New Member

    Messages:
    41
    Location:
    NJ
    They are connected with a tee fitting. The supply line is perectly horizontal so I don't understand how some of the heads could be above ground now.
  4. Fireguy97

    Fireguy97 Irrigation Contractor

    Did you replace the heads with the exact same brand and style? If you did that, then you could have simply exposed the top of the head, unscred it, removed the 'guts' and spring and replaced it with the new 'guts', spring and top leaving only the old body still in the ground.

    Was the replacemant head the same length as the old heads?

    If connected to a tee, the nipple could either be too long or not in the fitting or the head deep enough. If you backfilled the soil aroung the heads with out compressing it, the soil around the heads would have compressed over time and given you the impression the the heads were up, when actually, the soil is down.

    The biggest reason that I don't install systems with a vertical tee is that there is no 'give' if a hard object comes in contact with the sprinkler head. Either the head, the tee, or the pipe will break. If the lines are installed with the tee flat, or horizontal with a swing joint or a flex joint, then there is a lot more 'give' in the line. This way the head has flexibility in all directions. At the most you might have to replace a marlex fitting, but that is simple and costs pennies. It's also a lot easier to place the head at the exact height of the turf when backfilling.

    Give me a few minutes and I'll get some pictures of the two styles.

    Mick
  5. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,358
    Location:
    Yakima WA
    Sprinkler heads of any brand and style should be connected with a swing joint made with "funny pipe" and elbows. This not only allows for adjust the sprinklers to the proper level, it allow some "give" if the head is stepped on or run over by equipment. Saves digging up the lawn and repairing broken main lines.
  6. vaman

    vaman New Member

    Messages:
    41
    Location:
    NJ
    I have some pictures and the line which I will attach on a new post. They will probably explain it better than my words.
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