On Tue, 06 Mar 2012 18:04:51 -0600, DanG wrote:

It is meant to be easier to
adjust height and much easier to repair heads.

It's certainly easier to adjust height ... but I'd have to think how the
triple rigid swing riser makes it easier to repair heads.

I guess it's because the bottom of the sprinkler head is about half a
foot less deep into the ground?