Devices, systems, and methods for continually degassing / venting a feedstream within a filtration system. The filtration system may include a filter device utilizing hollow fiber filters to filter the feedstream. Additional venting hollow fiber filters vent gas from the filtration system to outside the filtration system. The venting hollow fiber filters may have ends which expose the interior lumens thereof to outside the filter unit to vent gases which pass through the walls of the hollow fiber filters. Degassed permeate thus flows through the filtering hollow fiber filters.