[villagetinker]

To the gentleman I spoke to today (2/12) {Brooklyn accent} about raising irrigation popup, I found a solution! Buy a 4 inch coupler and the shortest piece of 4 inch pipe. I cut the coupling about 1.5 inches wide, and the same for the pipe. I put the coupling on the popup, and the pipe into the coupling, and then inserted this assembly onto the pipe in the ground. Perfect fit and height.
Now, I have 1/2 of a coupling and several inches of pipe, so if this finds you contact me and I will make up an adapter for you.