Will this quick-disconnect couple to the...
Will this quick-disconnect couple to the quick-disconnect that comes with the Katadyn hiker pro?
It should connect to the Hiker without a problem. What I have done with mine is put the male end of the connection into output the hose of your Katadyn and you are all set.
They definitely fit! My Katadyn fittings plug right into my Platypus big zip with no leaks. The big zip has the same fittings as these.