The FTG, Inc. diesel fuel filter/water separators with integral coolant-type fuel heaters are designed to help customers brave the challenges of operating in cold climates. They offer customers a variety of solutions for diesel or biodiesel fuel systems to help keep their engines and equipment running through the coldest weather. Models offered include the 424, 525, 6400, and 777 to offer users various configurations for flexibility of installation, filtration efficiency and flow rate capacity. They provide fuel filtration, water separation, and fuel heating for various applications.