I m from Gulbarga karnataka, It's a worst product we have ever seen.it's a waste of money and water, we installed by connecting water tank of 1000 liter capacity, it's wasting whole tank in a night and not even giving a liter of filtered water up to morning, , totally disappointed it's continuing with water intake and a loud sound is coming from it. Please let me know is there any return or exchange or warranty for this product, what should I do now?