Culligan 9" Owner's Manual page 20

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Backwash Flow Control, Eductor Nozzle—Throat
Use the recommended backwash flow control, eductor nozzle, and eductor throat for various size tanks.
See Table 2.
Refer to Figure 6 through Figure 9
nozzle, and eductor throat.
Unit Backwash Flow
9" Upflow 2.5–3.1 gpm (#2 Brown)*
10" Upflow 2.5–3.1 gpm (#2 Brown)*
9" Downflow 2.5–3.1 gpm (#2 Brown)*
10" Downflow 2.5–3.1 gpm (#2 Brown)*
12" Downflow 3.0–3.2 gpm (#3 Green)
14" Downflow 5.3 gpm (Black)
* Shipped assembled inside the control standard from factory
NOTE For upflow models, the backwash and fast rinse default times are set at five
(5) minutes.
Eductor Nozzle and Throat Replacement
Refer to Figure 6 and the instructions below when changing the eductor nozzle and throat.
1. Remove the eductor cap clip.
2. Remove the eductor cap.
3. Remove the eductor assembly.
4. Remove the eductor screen from the assembly
5. Remove the blue nozzle and replace it with the correct nozzle. See Table 2.
6. Make sure to put the O-ring on the nozzle.
7. Replace the eductor throat if required.
8. Reverse the procedure to reassemble.
NOTE Observe the orientation of the arrow on the eductor cap. The arrow faces
down for downflow regeneration applications; the arrow faces up for
upflow/proportional brining regeneration applications.
Eductor Cap
and instructions below for changing the backwash flow control, eductor
Nozzle
Green
Table 2. Flow Restrictors.
Clip
Screen
Nozzle
Throat
Figure 6. Removing the eductor nozzle and throat.
Throat
Blue* Gray*
Blue White
Blue* Light Brown*
Beige Light Brown
Beige Light Brown
Blue
Brine Refill Flow
0.45 gpm
0.45 gpm
0.45 gpm
0.45 gpm
0.8 gpm
0.8 gpm