Air dryer on 2012 Cascadia

I've had this 2012 Cascadia with DD15 ENGINE since November 2011. It has 906,600 miles on it. I've never gotten any water when I let air or my secondary tank. Until recently. It took my a while but I finally replaced the air dryer a few days ago. When though it's not kicking out water like a high speed hose trying to was my truck. Them again I haven't got any rain. I'm still getting a tiny bit of vapor. Should I be concerned? And air compressor was replaced early last year in 2018

 

Thanks. The last year-and-a-half I've gotten into checking my truck out more often. Then I ever did when I was with Swift (yeah I know). Seriously with all the miles I have on this truck. this may only have been the third air dryer that been put on. I've discovered if a drivers has depended on his buddies at the Swift maintenance shop to tell them about certain maintenance procedure that might need to be done. he's going to discover later on that there's a lot of maintenance stuff that he's going to miss out on one. Because Swift doesn't doesn't keep their trucks that long maybe I'll trade a minute before those maintenance procedures are due.