An oil filter includes a housing body, a housing cover, a check valve and a filter core. The filter core and the check valve are mounted in a filtering oil cavity of the housing body. The housing cover is mounted on the housing body and includes a top cover plate and a bottom cover plate. The top cover plate is engaged with the top of the housing body by compressing the outer periphery of the top cover plate to cover the top outer periphery of the housing body. The top cover plate is firmly attached to the bottom cover plate by compressing. The structural strength of the housing cover is enhanced and solves the damage and leaking problems for extending the life of the oil filter.

An internal combustion engine includes a blower housing and a filtration system positioned in a path of cooling air from the blower housing. The filtration system includes a filter housing comprising a base that defines a series of radially extending fins extending circumferentially around the base, and a filter cartridge defining a longitudinal axis and being removably arranged within the filter housing. The base includes a drain and a channel formed radially between a first raised surface and a second raised surface, and the drain is in fluid communication with the channel. The filter cartridge includes a bottom endplate in engagement with both the first raised surface and the second raised surface so that fluid flow is inhibited through the channel and to the drain, and a filter media extending axially from the bottom endplate.

A modular water filtration system including a filter manifold and a filter cartridge is provided. The filter manifold includes a body, a first arm member, a second arm member, a brace, and a slot positioned on the brace. The filter cartridge includes a cartridge head and a fin member protruding upwardly from the cartridge head, and the fin member is sized to be received within the slot of the filter manifold. The filter cartridge is adapted to engage the filter manifold through a horizontal force when the fin member is aligned with the slot.

A filtration system comprises a housing and a shell housing removably coupled to the housing. A valve comprise a valve housing and a plunger. The plunger comprises a seal member structured to seal an opening in the valve housing. The plunger is axially movable between a closed position, in which the seal member seals the opening, and an open position, in which the seal member does not seal the opening, thereby permitting fluid to flow through the valve housing. A filter element comprises filter media and an endcap. The endcap comprises an alignment tab configured to rotationally secure the filter element with respect to the shell housing when the shell housing is received in the housing. The endcap comprise a valve interaction projection structured to transfer rotation of the filter element and the shell housing to the plunger during installation of the filter element.