Your pump will be guaranteed against failure due to defective materials or workmanship for the period specified. Please note that the guarantee does not include items subject to "wear and tear" such as rotors and filters. The manufacturers all say that the guarantee is null & void if you fail to maintain the pump properly by neglecting to wash or change filters regularly, if you allow it to run dry, or if you allow it to become frost damaged. Details of the guarantee and how to carry out routine maintenance are supplied with each pump. Please keep your invoice/receipt and your instruction manual in a safe place.