On average, whole house water filter cartridges should be replaced every 3-6 months, but the exact frequency depends on the quality of the water and how much it is used. In case of low water quality and heavy consumption, it is recommended to replace cartridges more often to ensure reliable cleaning and avoid clogging of the system. For more detailed information about replacing cartridges for water purification systems, you can visit the whole house water filters website
https://filterway.com/whole-house-systems/, where various filter models and recommendations for their maintenance are presented.