Backwash Control - Comes with Orings ( 2F and 3F ) installed.
Please select tank diameter.
Note: Your old Back Wash should have a small number on it that matches your resin tank diameter.

Part numbers:
7" tank = 25F7 = 1000209 ( 1.2 gpm )
8" tank = 25F8 = 1000210 ( 1.6 gpm )
9" tank = 25F9 = 1000211 ( 2.0 gpm )
10" tank = 25F10 = 1000212 ( 2.5 gpm )
12" tank = 25F12 = 1000213 ( 3.5 gpm )
13" tank = 25F13 = 1000214 ( 4.1 gpm )
14" tank = 25F14 = 1000215 ( 4.8 gpm )