Depending on the service and the water quality feeding the contactor, the estimated life for Liqui-Cel is approximately 1 to 8 years. Please note that Liqui-Cel is very sensitive to chlorine and other oxidizers, and can be severely damaged as well as lifetime is significantly reduced if oxidizers are present.  Please refer to the section on expected service life in the Liqui-Cel Design & Operating Guidelines (applicable to EXF-series and assuming RO permeate quality water).