Waters 2707 Operator's Manual page 57

4. Loosen the nut that connects the tubing to port 4 of the injection valve.
5. Pull the sample needle out of its fitting by the tubing.
6. Install a new needle assembly.
Recommendation:
7. Using the needle connection nut, tighten the needle assembly.
8. Connect the other end of the needle connection tubing to port 4 of the
injection valve.
Recommendation:
9. In the new Replace Needle window, click Reset.
Make sure the air seal encircles the needle.
To avoid blocking the tubing, finger tighten only.
Nut connecting tubing
to port 4
Tubing
Needle connection nut
Chrome locking nut
Air needle
Replacing the sample needle 3-7