Waters Xevo TQD Operator's, Overview And Maintenance Manual page 122

7. Grasp the isolation valve and pull it out of the ion block.
8. Use the O-ring removal kit to carefully remove the isolation valve O-ring
(see page
9. If the isolation valve O-ring shows signs of deterioration or damage,
dispose of it in accordance with local environmental regulations.
4-46 Maintenance Procedures
4-19).
The isolation valve O-ring can be contaminated
Warning:
with biohazardous and/or toxic materials. Dispose of it
according to local environmental regulations.
Isolation valve
O-ring