The invention relates to container bodies configured to be used in filter-as-you-pour systems, where filtering is achieved as the user pours water from the container. Such container bodies may have an undivided internal storage volume, so as to not include a reservoir compartment for unfiltered water. They may be part of systems configured to filter water both as water is introduced into a container body of the system and as water is poured from the container body of the system. The filter assembly may be attached to the container body at a location proximate the outlet of the system. Filter media of the filter assembly may comprise an activated carbon textile material that presents a curved surface to water passing through the filter assembly. The container body may be configured as a pitcher, carafe, water bottle, jug, or other shaped container.

An oil filter may include a housing. The housing may include an inlet, an outlet, and a filter element. The filter element may be located downstream of the inlet and upstream of the outlet. Additionally, the filter element may include a filtering material and a tracer material.

In a filter cartridge (CC) for a fuel filter, the filter element (4) and the additive module are connected and typically stacked so as to allow them to be integrally inserted into a filter housing. The substantially annular filter medium (5) delimits an inner space (9) into which at least one part (24) of the attachment end of the additive module can be engaged. The liquid additive is stored in a casing forming a tank (13) that is placed at a fuel pressure and delimits an internal volume (V2) that can be varied so as to maintain an identical pressure between the liquid additive and the fuel at the periphery (V3) of the tank (13). The additive module has an external connection (28) with a liquid additive outlet pipe (12a), said external connection (28) including sealing means (37, 38) for automatically closing the outlet pipe in a fluidtight manner when the external connection is in a disengaged state.

A device and method for filtering a liquid, wherein the device (100) comprises a container (110), a filter unit (120) and a filtering medium (130). The container (110) holds the liquid (10) containing a solid substance (10a), and the filter unit (120) is slidable in the container (110). The filtering medium (130) is non-permeable to the solid substance (10a) in the liquid (10).

A water purification system (100) is provided and includes: a composite filter cartridge assembly (1), a booster pump (4), a waste-water solenoid valve (7) and a water storage device. The composite filter cartridge assembly (1) includes a filter casing (11) and a composite filter cartridge (12). A pretreated-water outlet (114) of the filter casing (11) is connected with a water-output end of a pretreating filter cartridge (121) of the composite filter cartridge (12) and with the booster pump (4). A pretreated-water inlet (115) of the filter casing (11) is connected with a water-input end of a fine filter cartridge (122) of the composite filter cartridge (12) and with the booster pump (4). A purified-water port (116) of the filter casing (11) is connected with a water-output end of the fine filter cartridge (122), a water-input end of a mouthfeel-improving filter cartridge (123) of the composite filter cartridge (12) and the water storage device.

A filter cartridge with easier extraction provided by a roll-out clearance region for a radial seal is provided. The filter cartridge may be a two stage filter with the seal being located between stages and usable in a filtration vessel having a central separation wall with one or more riser pipes. Also, a new vessel is disclosed with multiple diameters for first and second stages of the housing with a larger second stage diameter as compared to the first stage, which can reduce door size and/or cause fluid flow velocities to be slower at the second stage relative to the first stage.

A connection head for a filter cartridge, which is easy and safe to handle. The connection head comprises a housing that has an inlet and an outlet, wherein said inlet and outlet have a port to which a detachable adapter piece for water conduit can be mounted. The adapter piece is attachable by a quick-release fastener. The quick-release fastener comprises a locking element, which locks the adapter piece by being rotated by about less than 90.

Aspects herein include filter systems including short-range wireless tracking features to detect insertion and/or removal of filter elements from filter systems. In an embodiment, a filtration system is included having a housing including a fluid inlet and a fluid outlet. The housing can define an internal volume. A first filter element can be removably disposed within the housing. A short-range wireless communication tag can be associated with the first filter element. A short-range wireless communication reader can be associated with the housing, the reader configured to wirelessly send data to and receive data from the tag when the reader and the tag are at a distance that is less than or equal to a maximum communication distance. Removal of the first filter element from the housing can cause the distance between the tag and the reader to exceed the maximum communication distance. Other embodiments are also included herein.

A dual stage filter assembly for use in a fluid cleaning and sludge removal operation, including a first stage separator incorporated into a first vessel and receiving a dirty fluid flow, a first stage clean fluid outlet extending from the first stage separator. A second stage filter is incorporated into a second vessel in fluidic communication with a dirty fluid outlet of the first stage separator for subsequent filtering and outflow through a second stage clean outlet. A flow restrictor is incorporated into said second stage clean outlet for controlling a flow rate through said filter in order to prevent clogging of the same by aggregating debris.

When a lid covers an opening portion formed at an upper end of a filter case with a bottomed substantially cylindrical shape inside which a filter element is disposed, the internal space between the lid and the filter case is formed. A bypass flow path connecting the internal space and outside space is formed in the lid, and a relief valve disposed moveably between a position closing the bypass flow path and a position opening the bypass flow path includes an air bleeder formed from a porous material.