To protect your equipment and extend the life of your batteries, the deionizer kit from Battery Watering Technologies can easily and inexpensively remove harmful impurities from the water. Dissolved impurities in standard tap water will degrade your batteries and decrease battery life and performance over time. The system is cost effective and easy to use. The Deionizer has an input and output hose that connects to any BWT or approved competitor filling device. One Filter Included, replacements can be purchased separately. Product ships directly from supplier, with a usual lead time of approximately one week.