Replacement filters for this system. Full 5 stage RO Filters Set + 5in 1 PH+ Alkaline Filter 192615899424.Filter cartridges should be changed every 6-12 months under domestic conditions. Filter life varies and depends on the water source quality. The item "10 Stage Home Undersink Alkaline + Reverse Osmosis RO Mix Housing System 50 GPD" is in sale since Tuesday, June 26, 2018. This item is in the category "Home & Garden\Kitchen, Dining & Bar\Small Kitchen Appliances\Water Purification\Water Filters".usa" and is located in Tonawanda, New York. This item can be shipped to United States, all countries in Europe, Canada, Australia, Japan, China, South Korea, Indonesia, Taiwan, Thailand, Hong Kong, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Malaysia, Brazil, Chile, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Turks and caicos islands, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guadeloupe, Jordan, Cambodia, Macao, Martinique, Maldives, Nicaragua, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.