MTS Model 286-31 Transient Permeability Pore Pressure Intensifier - Manual (Page 37)

Purging and Filling the Fluid Lines
286.31 Transient Permeability Pore Pressure Intensifier Operation 37
3. Stop the flow to the Fluid Reservoir.
Turn the Permeability Output valve to the Close position.
4. Uncap the Triaxial Cell’s upper pore pressure line if you have plugged it.