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SKU: GWEY8QXQI3 |  Mfg. Part: S300EW  | UPC: 766478948120  | 
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Whale S300EW Whale Seaward 3 Gallon Electric Water Heater - 120v - 1500w

10 Available
Condition: New

$604.66  $816.29
Whale Marine WHALE MARINE
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Whale Seaward 3 Gallon Electric Water Heater - 120V - 1500W

This compact 3-gallon electric water heater is designed for marine use, featuring a durable white epoxy coating that complements various installations. The Whale Seaward heater is one of the lightest models available at just 14 pounds, offering excellent corrosion resistance and energy-efficient performance.

Key Features Include:

  • Electric design for simplified installation and operation.
  • Constructed with robust materials to endure harsh marine environments.
  • Hold down brackets securely welded to the inner tank.
  • Double wall heat exchangers for enhanced safety and efficiency.
  • Integrated safety controls to ensure safe operation.
  • Pressure relief valve to prevent over-pressurization.
  • Temperature and pressure drain tube included for convenience.
  • Magnesium anodes available separately to protect against corrosion.
  • Robust exterior finish made from epoxy coating.
  • Ignition protected design, suitable for use in The Americas only.

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to P65Warnings.ca.gov.


  • Electric design for simplified installation and operation.
  • Constructed with robust materials to endure harsh marine environments.
  • Hold down brackets securely welded to the inner tank.
  • Double wall heat exchangers for enhanced safety and efficiency.
  • Integrated safety controls to ensure safe operation.
  • Pressure relief valve to prevent over-pressurization.
  • Temperature and pressure drain tube included for convenience.
  • Magnesium anodes available separately to protect against corrosion.
  • Robust exterior finish made from epoxy coating.
  • Ignition protected design, suitable for use in The Americas only.
  • Manufacturer:
  • Model Number:
  • ASIN:
  • Condition:
  • Weight:
  • Dimensions:
  • Updated:
  • Added:
  • Country of Origin:
  • Whale Marine
  • S300EW
  • B074KJNST3
  • New
  • 14.2 lbs
  • 17 X 15 X 17
  • Dec 01, 2025
  • Jul 14, 2023
  • United States

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Whale S300EW Whale Seaward 3 Gallon Electric Water Heater - 120v - 1500w

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