Isotemp

Isotemp SPA 15L Marine Water Heater

Item: #870736 | Part Number: Not Selected
$620.80 - $649.60
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        Total
        $620.80 - $649.60
        Need Help? Speak to an Outfitting Specialist [email protected] 1-800-628-8225 MON-FRI 9AM-5:30PM SAT 9AM-3PM
        Description

        • Marine-grade 4-gallon water heater with 750W heating element
        • 316 stainless steel inner tank with thick insulation for long service life
        • Built-in safety mixing valve prevents scalding while extending hot water capacity
        • Compact design supports horizontal or vertical installation

        Image of : Isotemp SPA 15L Marine Water Heater Isotemp SPA 15L Marine Water Heater Item # 870736

        Description

        Isotemp Water Heaters General Features:

        • All Isotemp water heaters use two thermostats: a temperature thermostat and a safety thermostat designed to trip in the event the tank is run dry
        • All Isotemp water heaters come standard with a mixing valve
        • Every Isotemp tank features a safety mixing valve that regulates the temperature of the water coming out of the tank so that water heated to 160+ degrees will not scald boat owners or their guests
        • Temperature of the hot water coming out of the tank can be adjusted to the preference of the owner by turning the mixing valve on the water heater
        • This feature allows the thermostat to be set at a higher temperature, while keeping the user safe from scalding
        • It also extends the capacity of onboard hot water by using only a fraction of the water in the tank to produce the desired water temperature
        • Standard heating elements are 750W which won't overload generators or trip dock breakers
        • All Isotemp products are CE certified and manufactured in ISO certified facilities
        • 750W immersion heating element as standard on all Isotemp Water Heaters
        • All Isotemp tanks are covered by a 5-year limited warranty against leakage due to manufacturing defect or corrosion and a 2-year warranty on all other parts

        Isotemp SPA 15 Marine Water Heater Features:

        • Exterior casing / jacket made of high quality polypropylene
        • Inner tank made of AISI 316 stainless steel
        • Includes safety valve, mixing valve and plug
        • Robust design and manufactured to highest-quality marine standards for long service life
        • Immersion heating element specially designed to heat water at bottom of tank
        • Thermostat-controlled mixing valve standard on all Isotemp water heaters
        • Aluminum mounting brackets adjustable for deck or bulkhead installations
        • Extra-thick insulation for low temperature loss, high performance
        • Extra-long corrugated coils for high heat exchange efficiency
        • Five-year limited warranty on inner tank against corrosion and material stress

        Specifications:

        • Tank Capacity: 4 Gal
        • Rated Pressure (bar): 6.0
        • Orientation: Horizontal or Vertical
        • Heat Exchanger: Front
        • Inlet/Outlet Ports: Male 1/2" NPT
        • Includes Safety Mixing valve and Pressure Release valve
        • 115V AC Model (6P1523SPA0003):
          • Power (Heating Element): 115V AC/750W
          • Plug: USA
        • 230V AC Model (6P1531SPA0003):
          • Power (Heating Element): 230V AC/750W
          • Plug: European

        Part Numbers for Isotemp SPA 15L Marine Water Heater

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        Reviews

        Rated 4 out of 5 by from so far, so good So far, so good. The real test happens after 3 yrs or so.
        Date published: 2026-06-01
        Rated 5 out of 5 by from Isotemp Hot Water Heater Exactly as ordered. Included installation instructions.
        Date published: 2024-05-29
        Rated 3 out of 5 by from Wouldn't expect rust on marine use item. I have not had a chance to use it yet, but when I removed the stainless steel bands to mount it, it already had rust under the bands even though it has been not used and stored inside.
        Date published: 2023-12-05
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        Questions

        Dimensions, please?

        Asked by: Manuel
        Please see the attached dimensional drawing
        Answered by: Upwind
        Date published: 2026-01-27

        What are the dimensions of the 16 liter water heater

        Asked by: EJHa
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        Isotemp SPA 15L Marine Water Heater
        Total:
        $620.80 - $649.60