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The Suburban SW10DE pairs a 12,000 BTU gas burner with an optional 1,440W electric element, so you can heat water on propane while boondocking or switch to electric when you have shore or generator power. The porcelain-lined steel tank and replaceable anode rod are built the same way home water heaters fight corrosion.
A dependable, direct fit replacement for RVs already running a Suburban 10-gallon heater.