Suburban, a division of Airxcel, announces a new line of 6 Gallon RV water heaters for the aftermarket designed for new water heater installations and to replace existing water heater models with aluminum storage tanks.  The Suburban Advantage 6 Gallon Water Heater fits in the same cutout as a 6 Gallon Atwood/Dometic water heater but is manufactured with a Porcelain Lined Steel Tank that, with the use of an anode rod, will have a longer life than aluminum tank models.