They are still out there!

Discussion in 'Irrigation' started by mrsteve, Jun 26, 2012.

  1. mrsteve

    mrsteve LawnSite Member
    Posts: 158

    Brass heads that is. Here's an example of one that was removed today. It still functioned, just didn't clear the Augustine very well. This system is all copper and was installed around the early sixties. Has a 2 1/2" main with very large zones operated by 2 1/2" W/M brass valves. Unfortunately its a real money pit for the owners as the trees are winning the underground battle for space. Plus it has the old (buy the book) spacing of 20' head X 17.3' row, so it doesn't like most nozzles. It was before my time, but I believe the fine threads were how you dialed in your height for the heads. Since they didn't pop up very high the height was critical. Some people will have the Lawn boys weed eat around them for clearance, nicknamed lunar landings.

    brass wm.jpg

    wm fine thread.jpg

    WM in the ground.jpg
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,943

    That's an "adjustable riser" version of the head, that lets you keep tweaking head elevations. There might have been MxF extender pieces, to let the elevating go on.
     
  3. There was a m/f extension boots. Riggs irrigation supply had the last remaining supply I could find so I bought all they had.
     
  4. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    Was it that white/opaque plastic one? Seen many of those.
     
  5. No these were still brass. The white ones came later. There was also a version which had the threads reversed.
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  6. mrsteve

    mrsteve LawnSite Member
    Posts: 158

    I found a fine thread to coarse thread from Champion. Sold as shrub adapter I think. It was brass and provided a good way to get to a 1/2" female thread that you could deal with. I've pulled many a plastic head off that was force threaded onto the fine threads or those little male to female 3" black cut offs done the same way. Surprisingly they held for a while. You better back up the lower fitting when twisting the brass head off, or your going to have to get out the torch! Simple head swap is now thirty minutes of sweating an adapter etc.
     
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,943

    Champion nozzle threads were defined as 3/4 x 27 ~ I wonder where else that standard was used
     
  8. Let me tell you a dirty low down time saver. If you snap the head off and you are down to the 1/2" copper on the fitting then take a 1/2" x 6" 3 way cutoff nipple and a small ring clamp. The nipple will fit snug over the 1/2" copper and then ring clamp it tight. Pre measure your popup and cutoff so you don't have to try and shorten it after install. I did that for years and never had one fail on me. They clamp sh!t up north so why can't we clamp it down south as well.
     
  9. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,943

    not a bad idea - of course they then change the ID of the cutoff risers and blow it all to hell :realmad:
     
  10. mrsteve

    mrsteve LawnSite Member
    Posts: 158

    I think Boots is right. Nothing I have will fit over the copper. The old green cut offs are very close, but the brown ones are smaller ID. It's a good idea in a pinch, might have to run a drill bit inside one to get the clearance. Thanks for the tip. Had to bring out a clamp today for a funny pipe barbed connection that keeps failing. The installers around here seem to be in love with the funny pipe these days.
     

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