Water filtration maintenance is component work: cartridges get swapped, media beds get checked, membranes get replaced, lamps get renewed and salt gets topped up, each on its own rhythm. A system that misses its maintenance does not stop flowing, it quietly stops filtering, which is worse. This page lists what each component in a home setup needs so nothing is discovered by taste.
Cartridges and membranes: the consumables
Sediment and carbon cartridges are true consumables: they load up and must be swapped on the manufacturer's published schedule, sooner when pressure visibly drops across the housing. A falling flow at the taps is often nothing more than a spent prefilter. Reverse osmosis membranes last much longer than the cartridges around them, but only when those prefilters are kept fresh, since chlorine and grit are what kill membranes early. Date every element when you fit it; memory is the least reliable component in the system.
Backwashing systems and UV lamps
Backwashing iron filters, carbon tanks and neutralizers largely service themselves, but they still need attention: confirm the control valve's clock is right so regeneration runs when it should, watch that the drain line flows freely during a manual backwash, and top up sacrificial media like calcite as the bed depletes. Ultraviolet lamps are subtler, because a lamp loses disinfecting intensity long before it stops glowing. Replace it on the maker's schedule regardless of appearance, and clean the quartz sleeve when scale or film dims it.
Softener care, and why iron changes the schedule
Softeners need salt kept above the water line in the brine tank, an occasional check for a salt bridge, a hollow crust that fakes a full tank, and a periodic clean of the brine tank itself. Wells add a sharper concern: Penn State Extension notes that oxidized iron fouls softener resin, so on iron-bearing water the upstream iron filter is itself softener maintenance, and resin cleaner or earlier resin replacement enters the schedule when iron gets through. If the system serves a well, fold these checks into the routine in our well water filtration system guide.
Questions people ask about water filtration maintenance
How do I know a filter cartridge is spent?
Falling pressure or flow at the taps, a return of the taste or staining the filter was fixing, or simply reaching the manufacturer's published replacement interval.
Why replace a UV lamp that still lights up?
Lamp output fades with running hours, so disinfecting intensity drops long before the glow does. The maker's replacement schedule tracks intensity, not visible light.
What maintenance does a water softener need?
Keep salt topped up, break up any salt bridge, clean the brine tank periodically, and protect the resin from iron, which Penn State Extension notes will foul it once oxidized.