Suburban's complete line of reliable water heaters for all recreational vehicle applications Porcelain-lined steel tank for long life Replaceable Anode Rod provides further corrosion protection Fast recovery rate Convenient exterior gas line connection One-piece, die-formed metal control housing protects controls from the weather Copolymer insulation jacket specially fitted to the tank to retain heat Direct Spark Ignition & Electric ElementTake advantage of campground or generator power to heat your water. A 1440 watt Incoloy electric element provides a recovery rate of 6 gallons per hour. For a fast recovery rate of 16.2 gallons per hour, both gas and electric can be used simultaneously. 12 Volt Control Switch, ON/OFF switch mounted inside for convenient control of water heater gas ignition AND powers the electric element circuit from the comfort of your RV