Abstract: Decanting apparatus for removing spent wash liquids from agglomerated red blood cells and like substances contained in an elongated pliable bag-like container has an inclined slide bed over which the container is draped. A cell-containing end portion of the container depends from the raised end of the slide bed, and the slide bed supports an elongated wash-receiving portion of the bag to maintain the bag under the tension required for decanting spent wash liquid from the former portion into the latter portion.An elevator mechanism supports the raised end of the slide bed and enables an operator selectively to elevate the bed as required for the decanting operation.A modular construction of the apparatus allows the slide bed and the elevator mechanism to be replaceably removed from the housing for cleansing and maintenance.