... regeneration can be adjusted as desiredRegeneration mode options: timer,meter immediate, mete delayed and specail holiday modeManual ... valve by timer) BNT-4651T (Filter valve by timer) BNT-4650F (Softener valve by meter, timer, meter delay, timer meter mix) ... BNT-4651F (Softener valve by meter,timer, meter delay, timer meter mix)Regeneration: ...