We have developed our own trolley system which allows us to operate independently from the van. This unit allows us to clean areas which would be difficult to access with a trailing hose. It is self contained with a 25 litre tank and its own 12 volt battery and pump unit. The unit is fitted with 10 metres of hose and can be used with any of our poles. It has rubber tyres so that it wont damage flooring and is designed to fit though a standard door.