The Everpure 4JT sanitizing cartridge is the preferred way to introduce ScaleKleen scale remover or other sanitizing agents, such as bleach into all water-using appliances and vending machines. The Everpure 4-JT is the ultimate flushing tool for Everpure systems. The Everpure 4JT EV960800 fits into existing Everpure filter heads. Eliminates the need for difficult component disassembly. Its an easy and convenient tool to help you clean and maintain your equipment. Approved by NAMA.