Arctic Fox's Hot Fox In-Tank / In-Line Fuel Warmer with Auxiliary Standpipe provides warm fuel for both main engine and fuel fired coolant pre-heaters, cab warmers or other fuel dependent products. This fuel warmer provides protection against fuel gelling problems associated with cold weather operation. Operators can reduce the use of blended fuel and winter fuel additives. Installation provides a long term solution that will likely last for the life of the truck. Available with 2mm or 4mm I.D. auxiliary fuel tube to accommodate most diesel fired coolant preheaters.