Change most water filter cartridges every two to three months. Ceramic candles last longer if you clean them. Replace any cartridge sooner if the water flow slows. The right timing depends on the filter type and the water in your home. This guide breaks it down.
How long each filter type lasts
How long a cartridge lasts depends on the filter. A carbon cartridge usually lasts about 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 lasts two to three years. If you are not sure which type you have, read our guide to the types of water filters.
Signs it is time to change
Watch for water that flows more slowly. That usually means the filter is clogged. A change in taste or smell is another sign. Cloudy water after filtering is also a warning. Do not wait for every sign to appear. Replace the cartridge on schedule so you stay safe.
What affects how fast it clogs
Dirty water clogs a filter faster. Hard water with a lot of minerals does the same. A large family also uses more water each day, which shortens cartridge life. If your water turns muddy when it rains, change the cartridge more often. Many water filters in Sri Lanka also make the cartridge easy to swap.
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 your water safe and the flow steady.
Time for a fresh filter? Shop TNS Go water filters with cartridges that are easy to change.
Frequently Asked Questions
How often should I change a water filter cartridge?
Change most cartridges every two to three months. Ceramic candles can last six months or more if you clean them. Replace the cartridge 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 water clarity also means it is time. Replace the cartridge on schedule so you stay safe.
