Kuuma 11800 Marine Water Heater ā 5 Gal, 120V AC, Side-Mount, Front Heat Exchanger (735-11800)
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Compact Hot Water for Smaller Vessels ā Shore Power or Engine Heat
The Kuuma 11800 (735-11800) is a 5-gallon marine water heater built for day boats, weekenders, and smaller cruisers where space is at a premium. The side-mount configuration opens up installation options in tight engine rooms and lockers, while the front-mounted heat exchanger ties into your engine's coolant loop for hot water production underway ā no shore power required once you're moving.
Key Features
- 5-Gallon Capacity ā right-sized for solo sailors, couples, and day-use vessels; compact footprint for tight spaces
- 120V AC / 1500W Element ā shore power compatible for marina and dock use
- Side-Mount Configuration ā flexible installation orientation for engine rooms and lockers where vertical or front-access mounting isn't practical
- Front-Mounted Heat Exchanger ā engine coolant loop integration for underway hot water; front placement suits forward engine room plumbing access
- Aluminum Tank & Aluminum Alloy Case ā reduces galvanic corrosion risk; lightweight build suited to smaller vessels
- 1/2" NPT Hot/Cold Connections ā standard fitting size for straightforward plumbing integration
- UL/CE Certified, Ignition Protected ā approved for gasoline-engine vessels; dual certification for US and European markets
ā ļø Important: Heat exchanger is designed for use with engine coolant only. Do not connect to raw water systems.
Parts Desk Insights
SKU 735-11800 is the 5-gallon entry in the Kuuma water heater line, sourced through Land 'N' Sea. This is the smallest-capacity unit in the Kuuma range reviewed to date ā position it for day boats and smaller cruisers where the 11-gallon 11841/11842 would be oversized. The side-mount configuration is a meaningful differentiator for customers with constrained installation spaces; confirm orientation compatibility with their specific engine room layout. Engine coolant-only restriction on the heat exchanger applies ā flag for raw-water-cooled engine vessels. Weight is recorded as 0g in the system ā missing data, obtain from Kuuma spec sheet and update. No image currently on file ā flag for photo or manufacturer asset request.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3ā4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us ā and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity ā and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.