Located under the top cover, the valve head on your softener houses a rotating metal cam.
The cam spins during a recharge cycle to route water through different paths within the system. The top of the cam is printed with letters to signify the different recharge stage positions:
S - Service (Normal flow, not recharging)
F - Fill (1st stage of recharge)
Br - Brine (2nd stage of recharge)
Bk - Backwash (3rd stage of recharge)
R - Rinse (4th and final stage of recharge)
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