only 3 pipes attached to the pump filter unit, 1 the sump hose, 2 the drain hose, 3 the filter draindown hose, small black pipe that should be blocked off with a plastic bung.
Thanks I thought as much but at the time no one would admit to having looked at the machine. I think they have lost the drain hose bung and jammed the draindown hose onto the nearest part they could reach, in this case the peg on the bottom of the suspension leg. Being extra careful as its in an upper flat.