Abstract: A compact, piston-driven water filtration system with annular cleaning device/brush. The filter apparatus operates based on a piston-driven pressure system where the piston is threadably mated to a water reservoir. Threading of the piston forces a sleeve connected thereto within the reservoir to force water through any suitable water filter (e.g. carbon-based, ceramic, micro- and/or nano-membrane materials) on the opposite side of the reservoir from the threadably-mated piston within the reservoir. The sleeve connected to the piston within the interior of the reservoir includes a cleaning device (e.g., brush, scraper, pad, etc.) on a distal end of the sleeve inside the water reservoir. The annular brush has an inner diameter smaller than that of the sleeve, such that as the piston is threaded into and out of the reservoir, the sleeve moves toward, over, and away from the filter, and the brush scrapes/scrubs/cleans the exterior of the filter for cleansing.

Abstract: A piston pressurized water filter activated by the user or external source. The water filter assembly includes a hollow cylindrical water reservoir, a hollow cylindrical piston threaded into the top of the water reservoir, and a water filter threaded into the bottom of the water reservoir. The interior of the water reservoir is sealed by the piston and water filter. When the water reservoir is filled with unfiltered water, the piston can be threaded down into the water reservoir to create sufficient pressure on the unfiltered water and force the water into the water filter. The water filter can include any combination of carbon, ceramic or other filtering material in a block or disk form. Water is forced into the water filter, through the carbon or ceramic filter mass, and into a container that may or may not be coupled to the water filter.

Abstract: A piston pressurized water filter activated by the user or external source. The water filter assembly includes a hollow cylindrical water reservoir, a hollow cylindrical piston threaded into the top of the water reservoir, and a water filter threaded into the bottom of the water reservoir. The interior of the water reservoir is sealed by the piston and water filter. When the water reservoir is filled with unfiltered water, the piston can be threaded down into the water reservoir to create sufficient pressure on the unfiltered water and force the water into the water filter. The water filter can include any combination of carbon, ceramic or other filtering material in a block or disk form. Water is forced into the water filter, through the carbon or ceramic filter mass, and into a container that may or may not be coupled to the water filter.