Abstract: A carrier vault for a workstation of a pneumatic tube system includes a rotatable carousel comprising at least a first and second carrier port, each carrier port sized and shaped to hold a carrier used to transport materials via the pneumatic tube system and to allow the carrier to pass through the carousel. The carousel is configured to rotate between a first position, where the first carrier port is aligned with an access tube of the pneumatic tube system and a second position, where the second carrier port is aligned with the access tube. The carrier vault further comprises a selection gate adjacent to the carousel comprising a rotatable plate and a selection gate opening. The selection gate is configured to rotate between an open position, where the carrier is allowed to pass through the plate, and a closed position, where the carrier is prevented from passing through the plate.