Whirlpool Water Filter: * Provides 100 gallons or up to six months of clean, filtered water and ice per filter * Removes 99% of lead and microbial cysts (cryptosporidium and giardia) * Reduces many other contaminants like 97% of trace levels of pharmaceuticals. (Pharmaceutical reduction is not certified by NSF/ANSI or state standard. Based on manufacturer testing for average reduction in trace levels of 12 pharmaceuticals. Pharmaceuticals may not be in all users" water.) * Fits refrigerators with Push Button In-Grille water filter and may be used with FAST FILL water dispensing systems. (Compatible with refrigerators that accept part numbers: 4396710, 4396711, 9020, 9030, 4396841, 4396842 and W10186667. May be used in Fast Fill water dispensing systems, but flow rate may not be optimal.)