Agilent TwisTorr 305-ICQ Manual Del Usuario página 237

Technical Information
To install the vent valve, unscrew the threaded plug (see figure below).
Figure 73
Then screw the vent valve into the pump and tighten it using a 16 mm hexagonal
spanner with a torque of 2.5 Nm.
Figure 74
Agilent TwisTorr 305-ICQ & 305-IC SF User Manual 237