A method of manufacturing bulked continuous carpet filament, said method comprising: providing a multi-screw extruder that comprises: (i) a first satellite screw extruder (425A-H), said first satellite screw extruder (425A-H) comprising a first satellite screw that is mounted to rotate about a central axis of said first satellite screw; (ii) a second satellite screw extruder (425A-H), said second satellite screw extruder (425A-H)comprising a second satellite screw that is mounted to rotate about a central axis of said second satellite screw; and (iii) a pressure regulation system that is adapted to maintain a pressure within said first and second satellite screw extruders (425A-H) below 1.8 millibars; using said pressure regulation system to reduce a pressure within said first and second satellite screw extruders (425A-H) to below about 1.8 millibars; while maintaining said pressure within said first and second satellite screw extruders (425A-H) below 1.8 millibars, passing a melt comprising recycled polymer through said multi-screw extruder so that: a first portion of said melt passes through said first satellite screw extruder (425A-H), and a second portion of said melt passes through said second satellite screw extruder (425A-H); and after said step of passing said melt of recycled polymer through said multi-screw extruder, forming said recycled polymer into bulked continuous carpet filament. providing a multi-screw extruder that comprises: (i) a first satellite screw extruder (425A-H), said first satellite screw extruder (425A-H) comprising a first satellite screw that is mounted to rotate about a central axis of said first satellite screw; (ii) a second satellite screw extruder (425A-H), said second satellite screw extruder (425A-H)comprising a second satellite screw that is mounted to rotate about a central axis of said second satellite screw; and (iii) a pressure regulation system that is adapted to maintain a pressure within said first and second satellite screw extruders (425A-H) below 1.8 millibars; (i) a first satellite screw extruder (425A-H), said first satellite screw extruder (425A-H) comprising a first satellite screw that is mounted to rotate about a central axis of said first satellite screw; (ii) a second satellite screw extruder (425A-H), said second satellite screw extruder (425A-H)comprising a second satellite screw that is mounted to rotate about a central axis of said second satellite screw; and (iii) a pressure regulation system that is adapted to maintain a pressure within said first and second satellite screw extruders (425A-H) below 1.8 millibars; using said pressure regulation system to reduce a pressure within said first and second satellite screw extruders (425A-H) to below about 1.8 millibars; while maintaining said pressure within said first and second satellite screw extruders (425A-H) below 1.8 millibars, passing a melt comprising recycled polymer through said multi-screw extruder so that: a first portion of said melt passes through said first satellite screw extruder (425A-H), and a second portion of said melt passes through said second satellite screw extruder (425A-H); and after said step of passing said melt of recycled polymer through said multi-screw extruder, forming said recycled polymer into bulked continuous carpet filament.