Apparatus, systems, and methods for purging exudate from a fluid container suitable for use with negative pressure therapy. A canister assembly configured to purge exudate can include a primary container, a first one-way valve, and a second one-way valve. The primary container can include an internal volume, a pressure inlet port, an exudate inlet port, and an exudate outlet port each in fluid communication with the internal volume. The first one-way valve can be in fluid communication with the exudate inlet port and the internal volume and configured to permit fluid flow into the internal volume and to restrict fluid flow out of the internal volume. The second one-way valve can be in fluid communication with the exudate outlet port and the internal volume and configured to permit fluid flow out of the internal volume and to restrict fluid flow into the internal volume.

Manifold for a medical/surgical waste collection assembly. A shell includes a proximal end base, and a lip extending proximally from the proximal end base. The lip extends around an outlet opening defined in the proximal end base that is off-centered to a longitudinal axis of the shell. A cap including a cap head is coupled to a side wall of the shell. A drip stop may be seated within a space defined by the lip to cover the outlet opening. An arcuate section of the lip may be flush with an adjacent section of the side wall. The cap head may define a through hole, and a flapper valve unit may be coupled to the cap head with another component having ears extending through the through hole. A fence may extend from the cap head and configured to be grasped by a user.

A canister for use in a negative pressure wound therapy system. The canister includes a first fluid chamber, a second fluid chamber, and a filter disposed between the first fluid chamber and the second fluid chamber. The first fluid chamber is configured to receive fluids from a tissue site. The filter is configured to filter the fluids from the tissue site as the fluids move from the first fluid chamber to the second fluid chamber.