A custom pump system was used to sample basement fluid. It connected to the CORK observatorys' fluid delivery lines. The design of this system changed over the course of the study. It included the pump components Pelagic Electronics 5010 series deep sea pump, and Sea-Bird SBE-5T submersible titanium pump. For a detailed description see:
Lin, Huei-Ting, et al. "Inorganic chemistry, gas compositions and dissolved organic carbon in fluids from sedimented young basaltic crust on the Juan de Fuca Ridge flanks." Geochimica et Cosmochimica Acta 85 (2012): 213-227. http://dx.doi.org/10.1016/j.gca.2012.02.017