Waters ACQUITY UPLC Operator's, Overview And Maintenance Manual page 74

Four-column configuration, with inlet switching-valve on the left-hand
side:
From
inject
valve
70
Column
APH
position 1
Column Manager-Aux
Column
APH
position 2
2
B 1 Inlet
switching
I
3 W
valve
6
4
5
Column
APH
position 3
Column Manager
Column
APH
position 4
LC detector
To detector
3
Outlet
switching
valve
4
Extended feet
Tubing
Router
Drip tray
Drip tube
2
1
B
3
O W
4
6
5
Drip tray with
leak detector
Tubing
Router