Filter with improved fluid flow

A filter comprising:

• a housing having one or more end surfaces, an interior surface, and an exterior surface,
• a membrane made of polysulfone disposed within the housing,
• a core comprising a plurality of series of openings in the interior surface of the housing to allow passing of fluid between the membrane and a hollow center of the core, wherein the core is disposed within the housing and is surrounded by the membrane,
• a fluid channel formed in the interior surface of the housing in a helical pattern with a helical pitch in an axial direction of the housing of less than or equal to about 50 mm, the fluid channel being formed between raised portions that are located between turns of the helical pattern of the interior surface of the housing, wherein the membrane is in direct contact with the raised portions, and
• a first end cap connected to the one or more end surfaces of the housing, edges of the membrane and the core, the first end cap comprises a first opening, a second opening and a third opening in the interior surface of the housing, the first opening acting as an inlet for fluid, the second opening acting as an outlet for the fluid and the third opening acting as a vent, the second opening is positioned in the center of the first end cap,
• the inlet in the interior surface of the housing to fluidly connect to a start of the fluid channel to pass the fluid through the membrane.