Kurt Ullman wrote:

About 18 years ago when we built the house, we put in sprinklers
right after the final grading. So, due to settling and other reasons
over the years, some of the heads even at full extension are spraying
much of the water into the ground nearby and not getting full benefit.
Are there any extensions of an inch or two that I could screw in or
other method of bringing the heads up a little? The are the spray heads
and not the big ones that popup and have the arm that makes them move
around.
I tried to dig them up and move them up that way, but it did not
work and they settled back down where they were before. These are Rain
Birds.


There are short extenders - 2"? - and there are also continuous threaded
extensions you can cut to size. Another nifty is flexible tubing that
you can put between the pipe and the head - special adapter at each end
- so you can offset the sprinkler head. These are nice if you are prone
to running over the head and breaking the pipe, or if the head is too
close to sidewalk.