A Tritium Filling Station to charge Inertial Confinement Fusion laser target microballoons with an equimolar mixture of tritium and deuterium has been designed, fabricated and pre-commissioned. The University of Rochester Laboratory for Laser Energetics will use the apparatus to produce targets for irradiation by their OMEGA glass laser. Microballoons are filled by diffusion through their walls. Each microballoon will hold about 5 millicuries of tritium in a deuterium-tritium mix at pressures of up to 15,000 kpa (2,200 psia). The maximum system tritium inventory is 10,000 curies.a Tritium and deuterium are stored in uranium beds. After retrieval from the beds, the deuterium-tritium mixture is assayed and transferred to the microballoon charging vessel via a unique palladium diffuser regulator. All components are housed in an inert atmosphere glove box with a getter-based purification system. The system design basis is presented with a description of mechanical and electrical components. Experience with the manufacture of tritium compatible equipment and subsequent system shop testing is described.