I don't have an answer to your question directly, but here is what I have decided about irons and water. All of them, the best of the will eventually spit water after they get old. I went through a couple of very expensive irons when I gave up, bought me a cheap iron at Walmart and use a spray bottle for water and use the iron without water inside of it. (Just dry.) My daughter buys irons from the Goodwill. I am sure there ended up there because they leaked water, but she uses them dry with a spray bottle. She thinks the older irons are hotter.
I know you want a pop up iron, and they do look great! Good luck with your new iron.