The Numatic WVD1502AP is a commercial vacuum cleaner particulary suited to picking up excessively large volumes of liquids. Inside the 50L drum is a sump pump fitted with a float switch. This model can simultaneously pump water out of the drum as the vacuum hose collects it. The waste water is pumped away down a 10m waste hose (this 10m hose can be extended up to 20m or 30m please call for details of this). This machine is particularly popular with water treatment companies. It comes complete with a comprehensive tool BB7 kit comprising: 2.4m Nuflex Vacuum Hose & 10m waste hose (& fittings)Stainless Steel Tube Bend2x Stainless Steel Extension Tubes400mm Widetrack Wet Pick Up Nozzle