CLAIMS:
`
`13
`
`1.
`
`A filter device for filtering drinking water, comprising:
`
`a housing configured for submersion in a water reservoir, comprising an intake aperture
`
`arranged for intake of water from the water reservoir and a return aperture arranged for returning water
`
`to the water reservoir,
`
`wherein the housing extends along an axis;
`
`a pump, housed in the housing, arranged on the axis to direct fluid from the intake aperture to
`
`the return aperture; and
`
`10
`
`a filter arrangement, housed in the housing, arranged along the axis from the pumpin a fluid
`
`path between the intake aperture and the return aperture, and
`
`wherein the housing further comprises:
`
`a first end for manipulation of the filter device by a user; and
`
`one or more spacers extending from a second end, the second end being opposedto thefirst
`
`15
`
`end, wherein the one or more spacers are configured for spacing the intake aperture from a surface of a
`
`water reservoir whilst allowing a passage of water into the intake aperture.
`
`2.
`
`Thefilter device according to claim 1, wherein:
`
`the housing is substantially shaped as a cylinder or prism.
`
`3.
`
`Thefilter device according to claim 2, wherein:
`
`at least one of the pump andthe filter arrangementis substantially shaped as a cylinder or
`
`prism, and arranged concentrically with the shape of the housing.
`
`4.
`
`Thefilter device according to any preceding claim, further comprising:
`
`a sub-housing housed in the housing for containing liquid-sensitive components.
`
`5.
`
`Thefilter device according to any preceding claim, wherein:
`
`the housing further comprises an access aperture, removably sealed by a sealing element, for
`
`allowing access to internal components ofthe filter device.
`
`20
`
`25
`
`30
`
`6.
`
`Thefilter device according to claim 5, wherein:
`
`the sub-housing comprises the sealing elementor the sealing element comprises the sub-
`
`35
`
`housing.
`
`7.
`
`Thefilter device according to any preceding claim, wherein:
`
`

`

`the filter arrangement encloses a space in fluid communication with an outlet of the pump.
`
`14
`
`8.
`
`The filter device according to any preceding claim, wherein:
`
`the filter arrangement comprises a plurality offilters, wherein at least onefilter of the plurality
`
`of filters has different filtration characteristics than another filter of the plurality offilters.
`
`9.
`
`Thefilter device according to any preceding claim, wherein:
`
`the filter arrangement comprises a UV light source arranged to direct UV light towards water
`
`in the fluid path.
`
`10.
`
`Thefilter device according to any preceding claim, wherein:
`
`the pumpis an electric pump or a mechanically powered pump.
`
`11.
`
`Thefilter device according to any preceding claim, wherein:
`
`the pump comprises a pumpintake arranged proximate to the intake aperture.
`
`12.
`
`Thefilter device according to any preceding claim, further comprising:
`
`a backflow prevention valve configured to prevent a backflow of water out from the intake
`
`aperture.
`
`10
`
`15
`
`20
`
`13.
`
`Thefilter device according to claim any preceding claim, wherein:
`
`the pumpis arrangedto direct fluid along the axis; and
`
`the return aperture is arranged perpendicular to the axis.
`
`25
`
`14.
`
`A system comprising:
`
`a water reservoir; and
`
`the filter device according to any of claims | to 13, wherein:
`
`the intake aperture and the return aperture are in fluid communication with the water
`
`reservoir.
`
`30
`
`

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