Vertex Water Products manufactures the Pure Water Cooler, one of the few water coolers that offers a reverse osmosis or UV add on to produce not only cold water but also clean, filtered water. They also make the Pure Water Machine, a four and five stage reverse osmosis system. The Pure Water Machine 4.0 is the recipient of the Water Quality Association's Gold Seal, attesting to the fact that the 4.0 has been tested and verified as an excellent and safe choice for filtering water. We offer all of the replacement parts, replacement water filters, and membranes that are needed to keep your Vertex running well and producing great tasting water. If you have questions about the correct replacement Vertex water filter for your system, contact our customer service experts at 1-877-335-3339.