When should you replace water-filter cartridges?
The model, water use and maintenance instructions determine the schedule. Keep the right records and know when to call before the due date.
There is no universal replacement interval
Replacement depends on the model, incoming water and consumption. Where a manufacturer specifies both a time limit and a capacity in litres, follow both limits.
For Filac’s All in One and whole-home cartridges, for example, the usual replacement interval is 6–12 months, depending on conditions. That interval should not automatically be applied to every RO membrane or component.
Keep a record from installation day
Save the system model, cartridge names, installation date and recommended next check. Note the number of users and connected appliances. Café or office demand needs its own assessment.
Ask Filac what the service includes and which replacement parts cost extra. A service visit and new cartridges are different items; confirm the terms for your model.
When to call earlier
Reduced flow, a new taste or smell, leaks and unusual operation merit a service call. EPA lists flow, taste and odour changes as possible RO maintenance signs. These symptoms do not identify a failed component on their own.
Lower incoming pressure can also affect flow. Tell the service provider whether the ordinary tap is affected too before ordering parts. If incoming-water quality seems doubtful, stop using it and contact the supplier.
Care after replacement
Follow the model’s instructions for cartridge flushing, tank cleaning and sanitizing. Ask about restarting after a long absence. Unsuitable cleaners or flushing methods can damage components.
Send Filac photos of the system and labels, plus the last service record. This helps the team select the right parts and prepare for the visit. Put the next service date in your calendar with a note of the work completed.