Quality Water FiltersContentsInternal Threaded Tap Diverter Adaptor 905 SmallWaterways 1665 2750 Water SoftenerHard Water Areas: (complete Hardness (th) >one Hundred Twenty PpmStandard System With Water SoftenerWater FiltrationAutomatic models count down the volume of water that's being handled by the softener. When capacity is nearing exhaustion,