Kuuma Products 11840 11-Gallon Marine Water Heater 120V Side Mount with Front Heat Exchanger

The Kuuma Products 11840 is an 11-gallon marine water heater designed to deliver reliable hot water aboard your vessel. It operates on 120V AC shore power (60Hz / 1500W) while docked, and features a front-mounted heat exchanger that harnesses residual engine coolant heat to warm water while underway — giving you two independent heating methods in one compact unit.

The tank and exterior jacket are constructed from marine-grade aluminum alloy, significantly reducing the risk of galvanic corrosion in saltwater environments. Side-to-side mounting brackets are included for secure installation. All plumbing and electrical connections are front-facing for simplified installation and maintenance access.

Key Features:

• 11-gallon capacity — ample hot water supply for galley and onboard use
• Dual heating modes — 120V AC electric element (1500W) or engine heat exchanger
• Marine-grade aluminum alloy tank and exterior jacket for corrosion resistance
• Front heat exchanger with 5/8" O.D. engine water inlet/outlet connections
• 1/2" Female NPT cold water inlet and warm water outlet connections
• L1 & N wiring configuration — 12.5A amp draw; 15A breaker recommended; stranded #12-3 wire
• T&P relief valve rated at 150 psi and 210°F for safe pressure and temperature protection
• High-temperature limiter with automatic reset for added safety
• Listed per UL 174 and CAN/CSA C22.2 No. 110
• Side-to-side mounting brackets included

Replacement Parts (MFG Reference): Heating Element #02858 | Thermostat #11930 | High Temp Limiter #11920 | Anode #11916 or #11919 | T&P Valve #10473

Note: A magnesium anode rod (sold separately, Kuuma #11916 or #11919) is recommended to extend tank life.