... 's household water filter L2L2 Can adsorption halogen, oils, color, and odor of metal impurity,remove impurities particle. Best choice for ... impurities particleFILTER CORE LIFEAccording to differences of water quality, filter core life differently, but can be used long term ... by replace the filter core.(See instructions)MAINTENANCE RECOMMENDATIONSBackwash once a week, at ...