Winterizing question

[hoolie59]

This is the first time I've winterized my 2015 3735 MK. For the most part, I think everything went well. I used the antifreeze method, didn't blow out the lines. Bathroom sink, shower, stool and outside shower pumped through fine. When I got to the kitchen, it took a little while for the solution to get there with the mid-kitchen layout. Once it got there, the stream of antifreeze was very weak, sputtering a little. Eventually, it wasn't coming through anymore. Pump was running, but it just didn't seem like it could push it that far anymore. I went back to the bathroom to check to see if it was coming through those again, and it was pumping through fine. I was only doing 1 unit at a time. I think I got enough through the hot and cold kitchen, but just can't figure why it quit pushing through. Plenty of antifreeze in the bucket, and the pump is pumping fine. Thoughts?