All the new GC's have float if it's got the factory valve. 1705, 1715, 1710 and the 1720. They're a bit tough to get in there at first. It's a pretty stiff detent. Push until you think the lever is going to break, it wont. I would try it with the machine off at first until you get it in there.
I have found instead of just pushing it goes in easier if you do a quick jab with the lever.
I can't tell you how many times I have tried and thought it was going to break even the salesman couldn't make it work.
Push until you think the lever is going to break, it wont.