Suburban Water Heater DSI & Electric 6 Gallon SW6DE 5239ADirect Spark Ignition and Electric Element (DE Models) Gas Water Heaters Take advantage of campground or generator power to heat your water with the 1440 WATT Incoloy electric element. The Incoloy electric element provides a recovery rate of 6. 1 gallons per hour. For a Faster RECOVERY rate of 16. 2 gallons per hour, use both gas and electric simultaneously. The water heater gas ignition is controlled by a switch mounted on the inside of your RV. Uses