Abstract: Some embodiments of the disclosure are directed to a fluid filter assembly including an outer filter element having a hollow core and an inner filter element having a hollow core. The inner filter element can be positioned within the hollow core of the outer filter element, thereby defining an internal fluid passage. In some embodiments, the first end of the outer filter element and the first end of the inner filter element can be supported by an open endcap assembly, which can also include a fluid inlet in fluid communication with the internal fluid passage. In some embodiments, at least one of the filter elements can include a pleated filter media.

Abstract: A filter assembly for filtering contaminants from any fluid stream. The housing of the filter assembly is preferably made of any metal and/or polymer, and can hold one or two externally centering filter elements or cartridges, each of which can hold a single filter, or multiple filters. Flow in filter housings having two externally centering filter elements or cartridges can be unidirectional or opposed.

Abstract: A filter assembly for filtering contaminants from a fluid stream. The housing of the filter assembly is preferably made of fiber reinforced plastic to prevent corrosion from the fluid stream, and can hold one or two filter elements or cartridges, each of which can hold a single filter, or multiple filters. Flow in filter housings having two elements can be unidirectional or opposed.