Yes they do......From what I understand, the hoses are designed specifically in length and shape to the pump application. I think it has something to do with friction loss etc. but I am not sure.
The ends need to be "clocked" right in relation to each other cuz the hoses don't "twist" very well for clearance around various accesories.
I've had to take couple back for adjustment cuz you can't just twist the ends in the hose for alignment.