A filter arrangement for threadably securing to a filter head includes a housing having a surrounding wall defining an interior volume, an open mouth providing access to the interior volume and an end opposite of the open mouth. The surrounding wall has an exterior and an interior. A filter media construction is operably held within the interior volume. A sleeve, distinct from the housing, is secured to the exterior of the surrounding wall adjacent to the housing mouth and extending partially along the surrounding wall. The sleeve has an exterior and an interior. The exterior of the sleeve defines mounting threads constructed and arranged to removably mount with the filter head, when the filter arrangement is secured to the filter head. The interior of the sleeve is against the exterior of the surrounding wall. A first seal member is oriented against the sleeve to create a seal with a filter head, when the filter arrangement is secured to the filter head. A filter assembly includes a filter arrangement and a filter head. The filter arrangement is removably secured to the filter head by a threaded connection between the sleeve and the filter head. A system includes an engine utilizing a liquid and a filter assembly in fluid communication with the engine to filter the liquid. Methods of making filter arrangements include utilizing structures characterized above.

A filtering system (10) includes a filtering apparatus having a filter unit for receiving liquid to be filtered, a receptacle for receiving filtered liquid, and an adapter (14) for coupling the filter unit to the receptacle, and also includes a base (12) having a cradle (26) for receiving the filtering apparatus and a base vacuum delivery port (28). The adapter includes an adapter vacuum receiving port (22) coupled to the vacuum delivery port for driving the liquid through the filter and—as filtered liquid—into the receptacle. The cradle and the adapter have an interlocking mechanism (52, 54) that locks the filtering apparatus to the cradle in a locking position in which the vacuum receiving port is sealingly coupled to the base vacuum delivery port. The base vacuum delivery port has a vacuum valve (30) constituted as a normally-closed valve automatically forced open when the filtering apparatus locks to the cradle.

An outlet mechanism with filtered water and tap water outlet modes includes: an inlet body and an outlet body; the inlet body is connected to the outlet body, which is disposed independently with a tap water outlet passage and a filtered water outlet passage inside; a first outlet control switch an a second outlet controls switch being respectively used to control the open and close of the tap water outlet passage and the filtered water outlet passage; the first outlet control switch is disposed on the inlet body, the second outlet control switch is disposed on the outlet body; and an outlet device being disposed independently at the end of the outlet body with a first outlet and a second outlet; the first outlet and the second outlet are respectively connected to the tap water outlet passage and the filtered water outlet passage.

A reverse osmosis prefilter system includes a recirculation chamber for accommodating one or more prefilter cartridges. The recirculation chamber is communicably interconnected to an inline water source and an RO filtration membrane. The recirculation chamber has a recirculation outlet and inlet which are communicably interconnected by an offline pump that recirculates prefiltered water repeatedly through the recirculation chamber and prefilter cartridges to remove particulates from the source water prior to delivery to the reverse osmosis filter membrane.

A drain control device for a filter system for filtering a media flow of a first medium and a second medium, wherein the filter system has a collecting chamber collecting the second medium separated from the media flow and provided with a media outlet, has a sensor arrangement with at least a first sensor unit. The first sensor unit detects a filling level of the second medium in the collecting chamber. The first sensor unit has a first optical sensor. One or more shut-off valves are arranged at the media outlet. The first sensor unit is coupled with the one or more shut-off valves to automatically drain the second medium from the collecting chamber through the media outlet when a predetermined filling level of the second medium in the collecting chamber is reached. A filter system with such a drain control device is provided.

A drain control device for a filter system for filtering a media flow of a first medium and a second medium, wherein the second medium separated from the media flow collects in a collecting chamber of the filter system, has sensor arrangement with at least a first sensor unit and a second sensor unit. The first and second sensor units detect a filling level of the second medium in the collecting chamber. The first and second sensor units operate based on a different action mechanism, respectively. One or more shut-off valves are arranged at a media outlet of the collecting chamber. The first and second sensor units are operatively connected with the one or more shut-off valves to automatically drain the second medium from the collecting chamber through the media outlet when a drain criterion is reached. A filter system with such a drain control device is provided.

A reusable fluid filter unit is disclosed. The reusable fluid filter unit encloses a filter and is removably connected to a manifold. In an embodiment, the filter unit includes an end cap that is detachable so as to replace the filter inside the filter unit. In an embodiment, the filter unit may include embossments or other structures that depress a mechanical valve in the manifold when the filter unit engages the manifold.

Pond filter unit and a method for operating a pond filter unit (1). A control unit (12) controls the operation of the pond filter unit (1), including the cleaning cycle of the filter (2′, 2″, 2′″). The pond filter unit (1) further comprises one or more plugs (14) for connecting one or more auxiliary devices, such as a separate pump, one or more additional pond filter units, illumination devices/lamps, air pumps, and/or feed automats. The control unit (12) of the pond filter further controls the one or more auxiliary devices connected to the plugs (14), such as pumps, air pumps, automatic feeding devices based on input settings for each of the one or more auxiliary devices. The control unit (12) further controls the cleaning cycle for cleaning of the filter (2) in the vessel (3). The cleaning cycle comprises a sequence of backwash and/or a mechanical filter cleaning sequence where a filter cleaning motor unit (6) rotates the filter cleaning device (7) in the vessel. During backwash, the valve (8) directs the water to the waste water outlet (11). The filter unit allows to control the one or more auxiliary devices by the pond filter control unit (12), and to coordinate the control of the additional devices in relation to the control of the filter.

A medical device includes: a hollow body part formed in a predetermined bent shape; a head part provided at a tip portion thereof with a discharge port for discharging cleaning water and detachably coupled to a front end of the body part; a connection part connected to a shower hose and a rear end of the body part and provided with a control valve for controlling water supply, a water flow rate and a water pressure; a water purification tube built in the body part and provided with leakage preventing grilles at both ends thereof; and a purified water discharge part provided inside the head part and configured to remove foreign substances in the water by using a filter.

The invention relates to a water tank (1) with water filter cartridge (2), characterized in that the water filter cartridge (2) comprises two water filter cartridge outlets which are arranged concentrically to one another.