FIRST NEED XLE PURIFIER First Need XLE (Elite) retains all the great features of the First Need XL and introduces more robust survivability and extended capacity with a new convenient, sanitary back rinse port, to remove accumulated debris without changing hose connections. The XLE canister is interchangeable with many earlier First Need systems. Removes bacteria, cysts, and viruses. "Direct Connect" fits most water bottles and hydration packs. Output: 2.0 qt/min. Cartridge capacity: 180 gal. Wt: 16 oz.