PER ENGINEERING: THE SUB FROM FILTERS WERE KEYED BY THE SUPPLIER. THE NEW FILTERS ARE NOT KEYED. THE ABSENCE OF THE KEY DOES NOT AFFECT THE SEALING OF THE FILTER OR THE INSTALLATION OF THE FILTER. USE ORIGINAL WATER BOWL & SENSORFROM OLD FILTER: 1. REMOVE CAP ON BOTTOMOF OLD FILTER 2. DISCONNECT WIF SENSOR -OLD FILTER 3. REMOVE BOWL ON OLD FILTER 4. SCREW BOWL ONTO NEW FILTER 5. ATTACH WIF SENSOR ON BOWL ON NEW FILTER NOTE: WIF SENSOR CAN BE REMOVED FROM WATER BOWL IF NEEDED.
