The 3/4" pvc takes 1/2" PEX (more flexible for water delivery). Depends on your video camera whether you will prefer 3/4" pvc or 1" pvc. I find with the 3/4" pvc and 1 fixed camera, I do not have enough pixels to tell if all hoops are in the field of view. Sometimes I have run out to the final hoop with an open umbrella to make sure I have it in field of view (have missed it on occasion).