The Watts 11" replacement cartridge bundle includes all of the filters you need to keep your Watts Quick-Change 50 GPD Four-Stage Reverse Osmosis System working properly for a full year. The sediment and carbon block pre-filters should be changed every 6 months. The granular activated carbon post-filter should be changed every 12 months. The reverse osmosis membrane should be replaced every 24 months.

The bundle includes:
    • Two 11” WQCSC11 Sediment Pre-Filters (Red)
    • Two 11” WQCCC11 Carbon Block Pre-Filters (Yellow)
    • One 11” WQCM11-50 50 GPD RO Membrane (Green)
    • One 11” WQCGAC11 Granular Activated Carbon Post-Filter (Blue)

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