re: Setting a 4x4 fence post in concrete on top of 2" schedule 40 pvc pipe

Post this on the home and garden board for some expert opinions, but I would dig down to the pipe, obviously being careful, put 2-3 inches of concrete and a little water on top of the pipes let that set, then come back and set the post, and might go with a galvanized steel post there because you will be giving up depth so you could use a 3” pipe and have more concrete, but 16” deep ain’t good enough for me