Whale Seaward 6 Gallon Hot Water Heater – White Epoxy – 120V (S600EW)

The Whale Seaward 6 Gallon Hot Water Heater (S600EW) is a durable and efficient marine hot water system designed to provide reliable onboard hot water for showers, sinks, and galley use. Built specifically for marine environments, it combines rugged construction with dependable heating performance.

Featuring a 6-gallon capacity tank and 120V, 1500W heating element, this unit delivers consistent hot water while maintaining energy efficiency. It can also function as a dual-source system, utilizing both 120V AC power and engine heat exchange (on compatible setups) for faster heating and reduced electrical demand. 

Constructed with a white epoxy-coated aluminum exterior, the heater offers excellent corrosion resistance and blends seamlessly into modern engine rooms. The inner tank is built from high-quality aluminum alloy, ensuring long service life in harsh marine conditions.

Designed for safety and durability, the system includes integrated pressure relief valves, thermostat control (approx. 140°F), and welded hold-down brackets for secure installation.  The double-wall heat exchanger design (on compatible models) enhances efficiency and reliability, making it suitable for extended cruising.

Its compact, horizontal-mount design allows installation in tight spaces, making it ideal for a wide range of boats.

Key Features

• Corrosion-Resistant Case: The white epoxy-coated aluminum housing is specifically chosen for marine environments, offering a lightweight yet durable barrier against salt and moisture.

• Rapid Heating: Equipped with a 1500W heating element, this unit is designed to provide hot water quickly when connected to dockside shore power or an onboard generator.

• Safety & Protection: The heater is ignition protected for safe installation in gasoline-powered engine rooms and includes an integrated pressure relief valve for system safety.

• Horizontal Configuration: Specifically designed for horizontal mounting to maximize space efficiency in lower bilge or engine compartments.

• Robust Tank Construction: Features hold-down brackets welded directly to the inner tank for maximum stability against heavy sea states and hull vibration.

• 6-gallon marine hot water heater

• 120V / 1500W electric heating element

• Optional engine heat exchange compatibility

• Durable white epoxy-coated aluminum case

• Corrosion-resistant aluminum inner tank

• Integrated pressure relief valve and thermostat control

• Double-wall heat exchanger design (model dependent)

• Horizontal mounting configuration for compact installation

• Built for harsh marine environments

Specifications

• Brand: Whale Marine (Seaward)

• Model: S600EW

• Capacity: 6 Gallons

• Voltage: 120V AC

• Power: 1500 Watts

• Temperature: ~140°F thermostat controlled

• Material: Aluminum tank / epoxy-coated exterior

• Mounting: Horizontal

• Approx. Dimensions: ~13" H x 13" W x 21" L 

• Weight: ~17.8 lbs 

• Application: Marine hot water systems (boats, yachts, cruisers)

In The Box

• (1) Whale Seaward 6 Gallon Water Heater

• (1) Integrated Pressure Relief Valve

• (1) Temperature & Pressure Drain Tube

• (2) Welded Hold-Down Brackets

• Installation and Operation Manual

Ensure reliable onboard comfort with the Whale Seaward 6 Gallon Water Heater, delivering efficient hot water, durable construction, and marine-grade performance for everyday use on the water.

Installation Tip: To significantly extend the life of your aluminum tank, it is highly recommended to install a magnesium anode. This sacrificial rod prevents galvanic corrosion and is especially critical if your water supply has high mineral content or salinity.