The scrubber is huge, probably designed due to the potentially long-duration dives performed in the surface supplied mode of operation. This is perhaps a 10-plus hour scrubber using the proper media. The scrubber is essentially two axial scrubbers in a single housing. The system is partitioned internally and the two bays are internally isolated. Each of the two bays of the scrubber are filled separately through their own filler port. The scrubber is removed by twisting four spring-loaded retainers 90 degrees and lifting it from the chassis.