Change most water filter cartridges every two to three months. Ceramic candles last longer with cleaning. Change any cartridge sooner if the water slows down. The right time depends on the filter type and your water. This guide breaks it down.
Change time by filter type
How often you change a cartridge depends on the filter type. A carbon cartridge usually lasts two to three months. A sediment cartridge lasts one to three months. A ceramic candle can last six months or more if you clean it. An RO membrane can last two to three years. If you’re not sure what you have, read our guide to the types of water filters.
Signs it is time to change
Watch for slow water flow. That usually means the filter is clogged. A change in taste or smell is another sign. Cloudy water after filtering is another one. Do not wait for every sign to appear. Change the cartridge on a schedule so you stay safe.
What affects how fast it clogs
Dirty water clogs a filter faster. Hard water with lots of minerals does the same. A big family also uses more water each day, so the cartridge wears out sooner. If your water looks muddy after rain, change it more often. A good water filter price in Sri Lanka model also makes the cartridge easier to replace.
How to make a cartridge last
Clean a ceramic candle with a soft brush. That clears the surface and helps it last longer. Keep a spare cartridge at home. Write the change date on a note near the filter. A clean cartridge keeps the water safe and the flow strong.
Frequently asked questions
How often should I change a water filter cartridge?
Change most cartridges every two to three months. Ceramic candles last six months or more with cleaning. Change sooner if the water flow slows or the taste changes.
How do I know my water filter needs changing?
The main sign is slow water flow. A change in taste, smell, or cloudy water also means it is time. Change on a schedule to stay safe.
