Nova
Couple thing to use as rule of thumb. Number of months has nothing to do with the cartridges. It is load that determines replacement.
When volume drops then sediment cartridge needs to be changed.
Carbon is like a sponge that you can’t wring out or backwash. Once it is full, the odor returns. Then replace it.
All these experts giving advice do not read. I sold this and water softeners for years in NH. Because of the hardness here, I prefer a water softener because a filter will not fix that.
Dirt and rust = filter
Odor = carbon filter.
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NH OLD MAN
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