Nilfisk AX400 and the Nilfisk AX300 and the earlier Advance Aquaclean carpet extraction machine 3 stage tangential vacuum motor fan unit. This is obsolete now, so see the aftermarket alternative GARM059 and the plastic fan top with the spout for the vacuum hose GARM-ADAP
PLEASE NOTE The photo is for an illustration only. The correct one, has a spout on the top grey fan cover, similar to the item in the second photo, for the hose to clamp on to.
SAFETY WARNING! All electrical parts should ONLY be fitted by an electrically COMPETENT person.
Maximise the saving on postage and buy some of the related parts below, such as dustbags and the filters or a new floor tool!
At the moment, standard postage within Australia is capped at a maximum of $20!