Katadyn Item # 8012889 The PUR Power Survivor 80E water maker is more efficient than conventional water makers. It can produce over 3 gallons of fresh water per hour - plenty of output for 4 to 6 people. Includes a 3-year warranty on all components. Best suited for those who use engine power more often. 80E is available in a quieter Self-Enclosed unit or Modular version for nook and cranny instillation.