A one year replacement warranty against and defects comes with each unit. This warranty does not cover damage caused by improper operation and/or damaged caused by using the unit outside of its specified operating parameters.  Damage due to clogged/damaged pre-filters, RO membranes, excessive sediment, chlorine,iron , silica,and manganese is out our control and not covered under warranty.  The manufacturer believes the information and data to be accurate.  The manufacture assumes no liability for results obtained or damages inured.  It is the users responsibility to determine the appropriateness of the product for the users specific use.