Isotherm Marine Water Heaters & Parts

11 results
CategoryBoat Plumbing Fixtures & Supplies
CategoryBoat & Marine Water Heaters
Show In-Stock Only

Isotemp Spa Water Heaters


Isotemp Spa Water Heaters

Available in 7 options

$646.99 - $944.03

In Stock
Basic Electric/Engine Water Heaters


Isotemp Basic Water Heaters

Available in 6 options

$966.99 - $1,218.99

In Stock
Isotherm Slim Water Heaters


Isotemp Slim Water Heaters

Available in 3 options

$816.99 - $910.99

In Stock
sfd00023aa of Isotherm Safety Valve


Safety Valve

SKU: 184649 | Item ID: ISO SFD00023AA


In Stock


Isotemp Slim Square Water Heater

SKU: 180778 | Item ID: ISO 601623QX00003


In Stock
see00014ha of Isotherm 110V/750W Heating Element


110V/750W Heating Element

SKU: 197811 | Item ID: ISO SEE00014HA


In Stock
sfb00002aa of Isotherm BSP to NPT Adapter


1/2" BSP to 1/2" NPT Adapter

SKU: 1018328 | Item ID: ISO SFB00002AA


In Stock
Image coming soon


Mixing Valve for Regular, Basic and Slim Water Heaters

SKU: 388407 | Item ID: ISO SFD00011AA


In Stock
sdf00025aa of Isotherm Gasket Set for Basic & Slim Water Heaters


Gasket Set for Basic & Slim Water Heaters

SKU: 207738 | Item ID: ISO SDF00025AA


In Stock


Replacement Zinc Anode for Water-Cooled SP Refrigeration Systems

SKU: 177091 | Item ID: ISO SBE00006AA


In Stock
sfe00021aa of Isotherm Braided Steel Hose


10" Braided Steel Water Heater Hose

SKU: 1022506 | Item ID: ISO SFE00021AA


In Stock
1-11 results of 11

Isotherm Marine Water Heaters from Fisheries Supply

Fisheries Supply knows the significance of a reliable water heating system on your boat. Our Isotherm marine water heaters guarantee a continuous supply of hot water for your comfort onboard.

Robust Construction

Isotherm marine water heaters are engineered to withstand the unique challenges of the marine environment. Featuring durable stainless steel construction, these water heaters are built to last.

Safe and Efficient Operation

Safety is a top priority for Isotherm marine water heaters. They are equipped with a thermostat mixing valve that mixes cold water with the hot water output, reducing the temperature to a safe level and preventing scalding. Additionally, some Isotherm tanks come standard with the Isotemp temperature control safety mixing valve, providing an extra layer of protection for users.

Versatile Sizing and Heating Options

Isotherm marine water heaters are available in a variety of sizes, so you can find the perfect fit for your boat. Furthermore, these water heaters come with an engine heat exchanger, allowing you to take advantage of warming the water from your running engine for efficient operation.

Space-Saving Designs

Recognizing the space constraints on board, Isotherm offers slim water heater models that are designed to maximize available space without compromising performance.

Key advantages:
  • Easy installation and maintenance
  • Energy-efficient operation
  • Durable and long-lasting construction
  • Customizable sizing and heating options
Browse our complete selection of Isotherm products.