1700 Series Marine Water Heater

Raritan Marine Water Heater

A marine water heater is simply a small, insulated tank downstream of the pump. You must have a pressurized water system to operate a water heater. The pump draws water from the storage tank(s) and fills the water heater tank. Inside the water heater is an electrical heating element and usually a coiled tube called a heat exchanger. When AC power is available, the electrical element (controlled by a thermostat) heats the water. Away from the dock, the hot engine coolant is routed through the coiled tube to heat the water in the tank when the engine is running.

Water heaters have four threaded ports. The tank inlet connects via a tee-connector to the outlet hose from the pump. A check valve is required in this line or in the heater to prevent hot water from migrating back toward the pump. The outlet connection supplies heated water to the hot side of all faucets, also using tee-connectors. The other two ports are for the heat exchanger connection, which varies depending on engine installation. Use only metal fittings to plumb a water heater, never plastic. If a pressure-release valve isn’t integral, the heater will have a fifth port for this essential component.


Technical Information

Weight N/A
Dimensions N/A

6 Gallon, 12 Gallon, 20 Gallon, Custom

Heat Exchanger

With Heat Exchanger, Without Heat Exchanger


120V AC, 240V AC

Heat Exchanger Fittings

GAZ Heat Exchanger Fittings, Metric Heat Exchanger Fittings, Standard NPT

Raritan Marine Water Heater

World-renowned marine water heater specially designed for the marine environment. Provides the comfort and convenience of reliable hot water.

  • Solid foam insulation means the water stays hot longer than with traditional fiberglass insulation
  • Proven long-life design
  • Withstands the rigors of the marine environment
  • Glass-lined tank is more durable than stainless steel
  • Attractive polymer jacket resists corrosion from dampness
  • Ignition-protected, adjustable thermostat
  • Environmentally friendly CFC-free foam insulation
  • Replaceable magnesium anode to protect tank and neutralize acids in the water
  • The tank is covered by a five-year Limited Warranty, The entire heater is covered by a two-year Limited Warranty
  • Each unit is assembled by hand, individually tested
  • Boat water heater vailable in 6, 12 and 20 gallon models – with or without engine heat exchangers
  • Available for 120V AC or 240V AC

We want to make sure you get the most convenience for your money. Please feel free to contact us with questions, or to review additional features available for your custom application.

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