Pure sparkling water is about more than just great taste. Shurflo's Watergaurd filtration products deliver high quality safety reliability and efficiency. Shurflo Waterguard Filters use only the highest quality approved materials available assuring great tasting water wherever you travel. The filter reduces chlorine taste and odour bad taste and odour and sediment. The long lasting carbon block disposable filter has a micro rating of 0.5 microns.