Waters Xevo TQ-S Operator's, Overview And Maintenance Manual page 143

6. Grasp the isolation valve, and pull it out of the ion block.
7. Use the O-ring removal kit to carefully remove the isolation valve O-ring
(see page 110).
Warning:
isolation valve O-ring according to local environmental
regulations. The O-ring can be contaminated with
biohazards or toxic materials.
8. If the isolation valve O-ring shows signs of deterioration or damage,
dispose of it in accordance with local environmental regulations.
To prevent spreading contamination, dispose of the
February 28, 2014, 715002212 Rev. C
Cleaning the ion block assembly
Isolation valve
O-ring
143