The Home Master Water Filter - Pressure Performance Series - Model #HMF3SFedgC The Home Master Filter Pressure Performance Series was designed with your comfort and convenience in mind. The Home Master Filter Pressure Performance Series uses oversized filters, housings, and fittings whenever possible to ensure your water pressure never falls short. Larger housings mean larger filters, which require less frequent service, which in turn saves you time, money, and inconvenience. 1st Stage Filter - dual gradient depth polypropylene sediment filter. 25 micron surface, 1 micron inner core - designed for purity with bacterial and chemical resistance - two separate gradient density layers enhanced filter performance - triple the dirt holding capacity of similar sized cartridges - typical life cycle 6 - 12 months depending on usage and sediment 7.0, Silica: <100 ppm, Manganese: <1 ppm, Iron: < 3ppm,Iron Bacteria: NONE, Hydrogen Sulfide: NONE.