Watts 1R-1Y-1B-1G Kwik-Change WQC4RO13-100 Replacement Filter Kit for 13" 100 GPD System - Not for PremierThe Watts WQC4RO13 100 Kwik Change replacement filter kit delivers a complete four stage filtration solution for your 13 inch 100 GPD reverse osmosis system. Engineered with double o ring seals and internal shutoff valves, this kit eliminates leaks and simplifies cartridge replacement across all filtration stages. SPECIFICATIONS Complete Kit Components Model Number Watts WQC4RO13 100 System Compatibility 13 inch 100 GPD Kwik Change (Not Premier) Stage