Raritan Engineering Water Heaters

Marine Water Heating Excellence from Raritan Engineering

When you need dependable hot water aboard your vessel, Raritan Engineering's 1700 Series Marine Water Heater brings efficient, long-lasting hot water to boats of all sizes—engineered specifically for marine durability and ease of installation. Whether you operate a sailboat, powerboat, or liveaboard yacht, Raritan's purpose-built water heaters deliver the comfort and convenience that marine environments demand. Unlike residential units adapted for boats, Raritan Engineering designs every component from the ground up to withstand the harsh conditions of life at sea.

The 1700 Series: Proven Design for Marine Applications

Built with a glass-lined steel tank and surrounded by high-density foam insulation, the 1700 Series maintains water temperature longer while reducing overall energy consumption. This construction approach addresses a critical challenge in marine water heating: corrosion resistance. The glass-lined tank resists corrosion better in marine conditions and is backed by a sacrificial magnesium anode for extended service life—even with inconsistent water quality or frequent use. The result is a water heater that outlasts conventional stainless steel alternatives while requiring less frequent maintenance.

The unit connects easily to existing ¾" NPT pressure water systems and is available in 6-, 12-, and 20-gallon sizes to match your vessel's layout. This range of capacities ensures that everyone from weekend cruisers to extended passage makers can find an appropriately sized solution without sacrificing valuable cabin or engine room space.

Dual-Source Heating for Maximum Versatility

One of the defining features of Raritan's marine water heaters is their flexible heating capability. With its powerful electric element, this heater delivers up to 13 gallons per hour (GPH) on 120V or up to 18 GPH on 240V, supporting multiple uses without delay. When you're plugged into shore power or running a generator, the electric element provides fast, efficient heating controlled by an adjustable thermostat that can be set up to 160°F.

For cruisers who want to conserve electrical power, the optional heat exchanger uses your engine's cooling system to heat water while underway—saving power by using heat that would otherwise be wasted. The 7-foot internal coil maximizes contact area for rapid thermal transfer without increasing system complexity. This dual-source capability means hot water is always available whether you're anchored, docked, or cruising offshore.

Installation and Serviceability

Installation is streamlined with all inlet, outlet, and relief valve connections on a single side, simplifying both initial setup and future maintenance work in cramped marine spaces. The compact, low-profile design fits into tight engine compartments and mechanical spaces where every cubic inch matters. Marine professionals and DIY installers alike appreciate the straightforward plumbing layout and marine-grade fittings that ensure leak-free operation in demanding conditions.

Raritan backs the 1700 Series with comprehensive warranty coverage and technical support, reflecting the company's decades of experience in marine sanitation and water systems. For boat owners who refuse to compromise on comfort or reliability, Raritan Engineering water heaters represent a proven solution that delivers consistent performance season after season.