Toll free number: 1800-200-7577. Hindware Vitreous China / Concealed Cistern come with 10 years warranty for residential homes and 5 years warranty for commercial applications. Warranty period is validated from date of purchase of the unit and can only be availed if the valid proof of purchase and warranty card is shown to Authorized Service Personnel at the time of repairs. Customers are therefore required to keep original invoice and warranty card safely. Repair or replacement will be carried out by company's service centre or it's authorized service associates.