Waters ACQUITY Isocratic Solvent Manager Overview And Maintenance Manual page 105

3. While holding the check valve in place with the 5/16-inch, open-end
wrench, use the 1/4-inch, open-end wrench to disconnect the
compression fitting.
Caution:
washer, which is normally on the top face of the check valve, does
not remain in the head (see the figure after
4. Use the 1/2-inch, open-end wrench to loosen the check valve, and then
remove the check valve assembly from the head.
5. Unpack the new check valve.
Place 5/16-inch wrench here
Compression fitting
When you remove the valve assembly, ensure the PEEK
September 26, 2013, 715004208 Rev. A
Replacing the accumulator check valve
Accumulator check valve
step 6).
Accumulator check valve
105