Water Quality Control Devices are associated with Controlled Outlets, Power Plants, Diverted Outlets, and Outlet Groups. They provide access to water at different elevations in the Reservoir pool. A Water Quality Control Device can only be used once. To add a Water Quality Control Device to an Outlet, Outlet Group, Power Plant, or Diverted Outlet, right-click on the opening in the Physical Tree on the Reservoir Editor's Physical tab and select the Add WQ Control Device in the popup menu.

Figure 12.5 – Control Device – Physical Tree
Alternatively, the menu option also appears in the openings menu on the main menu bar.

Figure 12.6 – Control Device – Menu Bar
Note: Pumps and Uncontrolled Outlets cannot have Water Quality Control Devices assigned to them, unless they are part of an Outlet Group.
The WQ Control Device can be renamed by right-clicking on the node in the Physical Tree and selecting Rename in the popup menu. A Rename dialog will appear. The name entered will be checked to be sure it is unique. There is also a Delete menu option on the popup menu. When the user selects Delete, a confirmation dialog will appear to confirm deletion of the WQ Control Device.
Additionally, when the WQ Control Device is selected in the tree, the menu options on the right-click popup menu for the WQ Control Device will be displayed in the menu bar under a WQ Control menu option. A similar menu behavior pattern occurs when an Outlet or any other item is selected in the tree.
The WQ Control Device uses the following Panel for entering related data:

Figure 12.7 – Water Quality Control Device Panel
The panel will add four Ports to the device by default. The user can change this number through the Number of Ports field. For each Port added, an Elevation must be entered in the Port Number/Elevation table. Ports are often opened and closed simultaneously. In this case, the user can enter how many ports work together in the Number of Ports Used Together field.
The Geometry will also need to be represented for the Ports in the Port Geometry area.
Note: WQ Control Devices are not restricted to controlled outlets; they can also be used on uncontrolled outlets.