My lawn has an underground sprinkler system. Many of the heads are old, leaking, and hard to adjust. So I've been swapping them with Rainbird 5000 series heads. They look like this:
Here's the thing. These things are impossible to dig up by hand. I spent 3 hours last night replacing 3 of these. They just screw off of the valve beneath them, counter clockwise, but can be a little stiff. I had to use one of those neat grippy jar opener things to get the 3 off, and my hands are now trashed.
The head, as you can see in the picture, has a texture. There must be some wrench or tool that works to quickly grip and twist these things off, without having to dig like crazy all around them in the yard (destroying the lawn in the process).
What tool would work for this? What tool is best for this?