Bosch Self Priming Suction Hose and Filter for Aquatak Pressure Washers Bosch's Self Priming Suction Hose can be used to supply your Aquatak Pressure Washer where running water sources are not available. It can draw in water either from a container or from an open water course such as a lake or pond. Using a suction hose frees you up to clean in remote locations, & can also prevent water wastage, saving you money. An inbuilt water strainer, fitted with a non-return valve, removes harmful particulates from the inflow, protecting your Pressure Washer's internal components from damage. The hose is 3m long, & is reinforced, for added durability.