The Watts 10" replacement cartridge bundle includes all of the filters you need to keep your Watts Quick-Twist 50 GPD Four-Stage Reverse Osmosis System working properly for a full year. This bundle includes two sediment pre-filters, two carbon block pre-filters and one GAC carbon post-filter. The sediment and carbon block pre-filters should be changed every 6-12 months and the GAC carbon post-filter should be changed every 12 months. (NOTE: The 50 GPD RO membrane is not included in this bundle.)

• Includes (2) 10” WQTSC-10 Sediment Pre-Filters
• Includes (2) 10” WQTCBC-10 Carbon Block Pre-Filters
• Includes (1) 10” WQTCGAC-10 GAC Post-Filter

NOTE: Orders over $99.00 qualify for free shipping within the 48 contiguous United States.