So I got my new washing machine delivered yesterday, figured there wouldn't
be a problem installing it, since I'd done it before.

However there was a problem, basically when I turned on the mains water went
everywhere! The hose didn't seem to fit the outlet tap properly. In my old
hose the inside part of the hose was slightly smaller than the diameter of
the outlet on the tap and so it fitted inside it and then you screwed the
outside of it down to make a seal. However the hose I was supplied with
appears to have the both the same size so they just fit flush with each
other, with no overlap, you can screw the outside down just the same, but
unsuprisingly the water gets out rather readily.

I solved the problem by simply using the hose which was previously connected
to the old machine and everything is fine. However I'd like to know why this
problem occured, because as from previous posts I'd like to plumb both
machines in at the same time, and I can't do that if the hoses don't fit :-(