When I took down the 12' C-Band dish another member of the site was kind enough to give to me, the pipe in the ground was 3.5" outer diameter and if I recall correctly, about 3.25 inner diameter and I suspect most large dishes use the same size pole so I think your pole is too thick. I am assuming this as I don't know the make and model of your dish. Paraclipse dishes seem to use 3.5" outer diameter pipe. Good luck!