SPECIFICATIONS: Type of installation: Countertop Maximum - Working Pressure: 689.5 Kpa (100 psig) - Minimum Working Pressure: 124 Kpa (20 psig) - Maximum Working Temperature: 38° C (100° F) - Minimum Working Temperature: 5° C (41° F) - Recommended Flow Rate: 0.2 - 1.0 gpm - Filter Life Expectancy: Up to 1 year - PROPUR LIMITED 2 YEAR WARRANTY: We sell our products with the intent that they are free from defects in materials and workmanship for a period of 2 years from date of purchase.