Whale S600 120V 6 Gallon Galvanized Marine Water Heater w/Rear ExchangeThis Whale boat water heater is ignition protected and features a rear heat exchanger. Constructed from marine galvanized steel for excellent corrosion resistance in marine environments. The front and rear hold down brackets are welded to the inner tank for a sturdy hold. An integrated pressure relief valve and temperature monitor safety controls keep your water heater from overheating. To prevent accidental freshwater contamination this hot water heater utilizes double wall heat exchangers.Product Features: Ignition Protected; Galvanized Steel Construction; Robust Manufacturing; Sturdy Exteriors; Double Wall Heat Exchangers; Safety Controls; Product Specifications: Capacity: 6 Gallon; Rear Heat Exchanger; Orientation: Horizontal; PSI Rating: 100; Width: 13"; Dept: 19"; Height: 13"; Click here for Whale F600 6 Gallon Marine Water Heater Owner's Manual