Implementations described herein include a system for guiding medical waste fluid into a medical waste collection canister. The system includes a manifold and a filter. The manifold includes a top surface and a sidewall extending from the top surface in a first direction that, together, define an interior chamber. The top surface includes an inlet port and a vacuum port. The inlet port connects to a source of medical waste fluid and the vacuum port connects to a vacuum source. A filter is positioned within the interior chamber of the manifold immediately upstream of the vacuum port so as to filter air flowing into the vacuum port. The filter extends away from the top surface of the manifold in the first direction. The filter is fused to a surface of the interior chamber or to a peripheral surface of the vacuum port to form a fused interface.
