Some years back, it was noted that the chlorinator made by Pentair had change their orientation on the I C 40. I just changed one for a customer this year and was putting it in backwards according to the display but found out soon after that according to the flow it was in 180° wrong. I also read that the orientation was changed because of the inlet coming in on the bottom so that the reading would be right. They should at least put a little note in with the box. Two simple?