Join Date: Jun 2005
Location: Oxford, UK
Car: Moonstone Green Rover 75 CDT Tourer Conn SE with Upsolute remap and Synergy 2
The whole pump assembly is the pump/filter housing which is attached by a flexible pipe to the pump adapter, which is a kind of rectagonal skeletal looking thing in white. It is this adapter that fits into the bottom of the tank, the pump is held in place by the ring at the top of the tank.
The pics on Ron's page don't show the part in question, just the pump and the filter housing.