Waters Xevo TQD Operator's, Overview And Maintenance Manual page 224

5. Insert one end of the tubing into the remaining port on the exhaust trap
bottle and route the other end to the exhaust vent.
6. Use snoop (or equivalent) leak detector liquid to ensure that there are no
leaks at the instrument exhaust and laboratory exhaust system line
connections.
Exhaust trap bottle:
B-16 External Connections
Leaks in the source exhaust system can result in
Warning:
the release of biohazardous or toxic materials. To confirm the
integrity of the source exhaust system, perform the following
leak test.
To avoid damage to the instrument, use snoop (or its
Caution:
equivalent) leak detector liquid only for the purpose described in
the following step. Do not use it on any other part of the
instrument.
TP03404
From instrument
exhaust connection
(12-mm OD)
To laboratory
exhaust port
(10-mm OD)