It was tough finding a filter that can handle all the chemicals in the water in Wash DC, but I finally found it with this company. Mr. Milevskiy, is always very helpful and answers questions promptly with thoroughness. The water tastes great. We had someone install it ( he said it wasn't difficult) and he said that he could instantly notice a difference just from the smell! "It didn't smell like chemicals anymore." Thank you very much for a great product.