Thanks for the quick response. I've got the first set of carts filled with Piezoflush, shown in the attached photo. (As the filling of these carts used up what i had, I ordered another bottle just yesterday.)
To give you a bit of background, I have a set of drain tubes installed in the output of the capping station, going to a collection bottle. I had drained the overflow bottle a while ago, and the system has been sitting for a few months.
Since I restarted the printer late last week, I removed the Epson OEM carts and replaced them with the Piezoflush filled ones on Saturday. I have gone through the desktop printer cleaning procedure, including the cleaning of the capping station, as you show on the video. From the picture, I must assume the vent is the small circle in front of the fill port, but wonder if the vent is working, as I filled these carts with the vacuum procedure you recommend.
So far, I've run the auto nozzle and head cleaning process once, and got some print out showing the Piezoflush color, but not much. After that, I've run the head cleaning and nozzle checks a couple of times, with none of the head checks showing any image. When I printed a test page yesterday, I get a faint result, in what looks like residual black, but no result showing the color of the Piezoflush.
So, the only conclusion I can come to is that nothing is getting through the heads. As I see it, I have 2 options: 1. remove the fill plugs in the carts and try it again, or 2. wait till the new bottle of Piezoflush shows up and manually clean each color station with the head cleaning kit i bought.
I'm also thinking the capping station drain may be clogged, and think if i use the Piezoflush in it and let it sit for a day or two, it might clear. If you do have any guidance, or thoughts, I can use all the help I can get. Thanks!