Keep safe, great tasting water flowing with PureSource Ultra II water filters — EPTWFU01 reduces up to 99 percent of contaminants, cuts back on plastic and saves the cost of bottled water. NSF and WQA certified. Look for our berry-colored design with our new Genuine Filters seal on the package to know for certain your filter is authentic and sold by Frigidaire. Frigidaire Genuine Filters – the smarter, safer choice.