I would imagine that it is at the base of the drum housing, located within the sump hose. You'll need to access the rear of the machine (unplug the machine first, to avoid any accidents/fatalities). I suspect as with most Hotpoints the lower panel will unscrew. Once inside, you'll see the pipe in question. Use big pliers or pump grips to remove the sercuring clamp.
Mike, September 2004