Shop new and used Cummins ISX Fuel / Water Separators on MyLittleSalesman.com . Compare active listings with prices from $13 to $329. Sellers include LKQ Heavy Truck, CRG Heavy Truck Parts, and Rydemore Heavy Duty Truck Parts. Filter by condition, price, or year to find the Cummins ISX Fuel / Water Separator that fits your job.