I deal with powered anodes all the time. Larry is familiar with them, but it isn’t part of his daily fare. The reverse is true of the air vents. I know what they are, but he’s dealt with them more. My thought is he was thinking of a simple tee with the vent in the top and the water flowing out the side because he didn’t realize that SKU25 uses a tee already and the anode has to occupy the top port. It might be possible to plumb a second tee past the side port of the first tee with the air vent it ITS top port, but I’m not certain it will work. Larry will know more about that.