Abstract: An infusion brewer is provided including piston and filter assemblies to be inserted into an infusion container. The piston assembly consists of a hollow vertical shaft, a horizontal plate with a seal situated at the edge of the plate, a seal situated at the center of the plate, and a check valve vent. The piston seals are adapted for sealing against the inner walls of the infusion container and for sealing against the filter assembly shaft. The filter assembly is positioned at the bottom of the infusion container and consists of a hollow vertical shaft and a horizontal plate with seals at the exterior edge and bottom surface. The filter assembly includes three graduated levels of filter material. The piston assembly pumps the infused extract through the filter assembly filters, thence through the filter shaft, thence through the piston shaft, into the isolated upper infused extract chamber.