Engineered for high-capacity marine demands. The Hubbell Seafare MSE water heater is specifically designed for marine use, with American Bureau of Shipping (ABS) Type Approval available as an option (at an additional cost). By utilizing deck and removable bulkhead mounting supports, the water heater is securely fastened to the ship structure, providing a secure and reliable water heater installation. To ensure tank longevity, the high-quality tank is constructed of steel and internally lined with HydraStone™ cement. The cement lining, along with solid copper-silicon threaded tank openings and a built-in heat trap device, all ensure a longer lasting, energy efficient water heater that's resistant to the highly corrosive effects of hot water.