Product warranties are under the sole discretion of Ming Trading LLC. Ming Trading reserves the right to void any warranty if improper use of the product is found; such as water damage, saltwater corrosion, salt creep, excessive heat due to improper installation, poor maintenance, etc. Zetlight, ISTA, Macro Aqua, H2Pro, Aqua Excel, SunSun, Jebao products have a 1 year limited warranty. Customer must provide the proof of purchase from retailer. Used or refurbished items are exempt from warranty. Retail sales exceeding 2 years after the original sale date from Ming Trading are exempt from warranty.