This LG water filter has NSF certifications 42 and 53. It reduces lead, cysts and chlorine taste and odor. It is also known as LT800P, and is for select LG side-by-side and bottom-freezer refrigerators. Make sure you use your model number to verify the right filter for your appliance. We recommend you replace your filter every 6 months, or more often if water flow slows noticeably. This part number includes 3 filters. Follow package instructions when you install this LG water filter.