Suburban's 6 Gallon Advantage RV Water Heaters replace aluminum tank water heaters. Constructed with porcelain lined steel tank. Built just like longer lasting residential tank water heaters. Anode rod protects against tank corrosion and doubles as a drain. Take advantage of campsite or generator power to heat water with the optional Incoloy Electric Element tank accessory. Industry exclusive flue tube slows combustion process to transfer more heat to water in tank. *For most aluminum tank “DE” model replacements utilizing an indoor mounted switch for LP gas ignition and electric element operation, the SAW6DEL Advantage Water Heater is the direct replacement model. Gas appliances should be installed and/or serviced by a qualified service technician. Backed by a 2 year limited warranty and the tank is backed by a 3 year tank limited warranty.