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Isotemp 6P6031SPA0100 - 230V/750W SPA 60L Stainless Steel Marine Heater without Safety, Mixing Valve
1-2 weeks delivery time The Isotemp 6P6031SPA0100 Spa 60L heater features a 16-gallon stainless-steel inner tank, a robust polypropylene casing and a 230V/750W immersion heater. Delivered without a safety valve and mixing valve, it is suitable for large onboard installations that use external pressure and temperature-control systems. Dimensions: 33.5" length, 15.4" OD. |
$ 988.41
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1-2 weeks delivery time The Isotherm SBE00045AA is a mounting bracket designed for securing basic heating elements in marine refrigeration and heating assemblies. Engineered for stable support and precise positioning, it ensures reliable operation, proper heat transfer, and long-term durability in demanding onboard environments. |
$ 118.70
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1-2 weeks delivery time The Isotherm SBE00046AA is a durable clip designed for securing Basic and Slim flange assemblies in marine refrigeration units. It ensures stable fastening, proper alignment, and reliable structural support, making it an essential replacement part for maintaining system integrity in demanding onboard environments. |
$ 53.60
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1-2 weeks delivery time The Isotemp SBE00047AA plastic cover kit includes the main cover, a small auxiliary cover and an original “Isotemp” label, designed for Basic series marine water heaters. It restores exterior protection, ensures clean installation appearance and uses durable marine-grade polymers resistant to moisture and engine-room conditions. |
$ 57.44
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1-2 weeks delivery time The Isotemp SBE00073AA is a tube-side plastic cover designed for Slim Square 16L marine water heaters. It protects plumbing connections, shields the element area and provides a clean, durable exterior finish made from marine-grade impact-resistant plastic. |
$ 80.41
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1-2 weeks delivery time The Isotherm SBE00073AB is a durable plastic back-side cover designed for Slim Square 16L refrigeration units. It provides reliable rear protection for internal components, ensuring proper enclosure, improved safety, and long-term durability in marine refrigeration installations. |
$ 61.26
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1-2 weeks delivery time The Isotherm SBE00075AA is a grey plastic tube-side cover designed for Slim Square 16L refrigeration units, providing reliable protection for tubing and side-mounted components. Its durable construction ensures safe enclosure, extended service life, and stable operation in marine environments. |
$ 26.81
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1-2 weeks delivery time The Isotemp SBE00089AA flange is a replacement mounting interface for heating elements installed on Slim Square 16L marine water heaters. Made from corrosion-resistant marine-grade metal, it ensures secure sealing, proper alignment and long-term reliability in compact onboard hot-water systems. |
$ 111.04
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1-2 weeks delivery time The Isotherm SBE00095AA is a replacement plastic cover designed for Slim series refrigeration boxes with capacities of 15, 20, and 25 liters. It provides proper protection and a clean front finish, ensuring reliable operation and maintaining the original appearance of Slim built-in units. |
$ 30.63
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1-2 weeks delivery time The Isotemp SBE00123AA sacrificial anode protects Isotemp Budget and Basic water heaters from internal corrosion by absorbing galvanic activity inside the stainless-steel tank. Designed for marine environments, it ensures longer heater lifespan and reliable operation. |
$ 107.21
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1-2 weeks delivery time The Isotherm SBE00151AA is a flange assembly designed for Basic series heating elements and equipped with a bimetallic thermostat. It provides secure mounting and integrated temperature control, ensuring stable and safe operation of marine heating systems. |
$ 145.49
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1-2 weeks delivery time The Isotherm SBE00205AA is a 3/8" sacrificial anode kit designed for marine water heaters. It protects the boiler’s internal tank from corrosion by absorbing electrochemical reactions, extending system lifespan and maintaining reliable hot-water performance. |
$ 271.85
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1-2 weeks delivery time The Isotherm SBE00206AA is a grey plastic protective cover designed for SPA series marine water heaters. It provides a clean exterior finish while shielding internal components from moisture, mechanical impact, and environmental exposure. |
$ 30.63
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1-2 weeks delivery time The Isotherm SDF00009AA is a durable rubber gasket designed for sealing the heating element on Isotemp Regular marine water heaters. It ensures a tight, leak-free connection, maintaining system pressure and protecting the heating element from moisture intrusion for reliable long-term operation. |
$ 22.97
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1-2 weeks delivery time The Isotherm SDF00018AA is an EPDM sealing gasket designed for Basic-series flanges, providing a reliable and durable watertight seal. Its EPDM construction ensures resistance to heat, moisture, and marine environmental conditions, helping maintain proper insulation and leak-free operation in refrigeration and heating systems. |
$ 65.10
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1-2 weeks delivery time The Isotherm SDF00021AA is a replacement sealing gasket designed for Basic-series heating elements, ensuring a secure and leak-free connection. Engineered for durability in marine environments, it maintains proper sealing around the heating element, protecting against water ingress, pressure variations, and temperature changes onboard. |
$ 22.97
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1-2 weeks delivery time The Isotherm SDF00024AA is a mounting bush designed for Basic and Slim heating element assemblies, providing secure positioning and stable mechanical support. It ensures proper alignment of the heating element within the tank, improving sealing reliability and maintaining optimal system performance in marine heating applications. |
$ 19.15
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1-2 weeks delivery time The Isotherm SDF00025AA is a complete gasket kit designed for Basic and Slim-B heating element assemblies. It includes the sealing components required to ensure leak-free operation, reliable insulation, and stable mounting of the heating element in marine water heaters, restoring proper system sealing and long-term performance. |
$ 57.44
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What are the primary features of the Isotemp marine water heater?
The Isotemp marine water heaters are specifically designed for use on yachts and boats, featuring a compact design like the Isotemp Slim and Isotemp Slim Square models, ideal for tight spaces. These water heaters come with high-quality components, including a heat exchanger that uses engine heat to warm the water in the tank. These Boat Hot Water Heater solutions come with high-quality components, including a heat exchanger that uses engine heat to warm the water in the tank. Available in various capacities, such as the 4.2-gallon (16L) or larger options like 25L and 40L, they also include a mixing valve to regulate water temperature, providing reliable performance onboard.
What are the key differences between the Isotemp Slim and Isotemp Basic water heaters?
The key differences between the Isotemp Slim and Isotemp Basic water heaters lie in their size and design. The Slim models, such as the Isotemp Slim 25L, are specifically designed for use in tight spaces on boats, featuring a compact design with high-quality components. In contrast, the Basic models, like the Basic 40L and Basic 75L, offer larger water tanks and come with standard features such as a mixing valve that regulates water temperature, providing additional protection and reliability for marine applications. Both lines can be effectively integrated into a Boat Heater system to ensure consistent hot water supply and onboard comfort.
What are the main safety features included in the Isotemp Spa water heater?
The Isotemp Spa Marine Water Heater is equipped with several key safety features, including a safety valve that helps regulate pressure and prevent overheating. It is designed with high-quality components, providing an additional layer of protection, and comes standard with a mixing valve to control water temperature. These features ensure reliable and safe operation for marine use, even in challenging conditions.
How does the Isotemp Slim Square water heater save space on boats and yachts?
The slim water heater utilizes a uniquely shallow, rectangular design that fits perfectly into narrow voids behind joinery or flat against bulkheads, spaces typically wasted on vessels. This efficient Slim Square profile unlocks installation possibilities in areas where conventional cylindrical heaters are impossible to place, directly preserving valuable cabin and storage room.
What role does the heating element play in maintaining consistent water temperature in Isotemp water heaters?
The electric heating element acts as the primary precision tool for raising and holding temperature. When the thermostat signals a drop, the 750w electric element activates to heat the water to the exact setpoint, ensuring the tank is always ready. For consistent warmth during use, the system seamlessly integrates multiple heat sources:
- The engine heat exchanger uses engine coolant from the coolant loop to heat the water while underway.
- The electrical immersion heater maintains temperature at the dock.
- A dedicated thermostat-controlled mixing valve then blends cold and hot water to deliver a safe, stable output.
How does the mixing valve in an Isotemp water heater enhance safety and comfort?
| Valve Mechanism | Safety Outcome | Comfort & Efficiency Gain |
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| Pre-Delivery Tempering | Eliminates the possibility of unmixed, stored water exiting the heater, preventing potential thermal injury at the tap. | Provides immediately usable water at a preselected temperature, removing the need for manual adjustment and reducing water waste. |
| Pressure-Balancing Spool | Instantly counteracts a drop in cold inlet pressure by proportionally restricting hot flow, averting a sudden temperature surge. | Maintains a stable shower temperature when other fixtures like washing machines or toilets are activated elsewhere in the system. |
| Fail-Safe Thermal Cutoff | A non-electrical wax actuator fully shuts off hot water outflow if the cold supply fails, ensuring a default safe state. | Operates automatically and independently, offering permanent protection without user maintenance or external power. |
| Factory-Set Limit Stop | Allows for a fixed maximum output temperature to be defined and mechanically locked, preventing accidental override. | Creates a uniform and predictable hot water experience across all household outlets, tailored to safe usage standards. |
What are the advantages of the 20L Isotemp water heater model for small vessels?
The compact Spa 20 model delivers a practical volume of hot water for its size, efficiently heated to 160 degrees using either the engine heat exchanger or its 750w electric element. Its smaller footprint and 11 gallon capacity make it the ideal balanced solution for galleys and heads on trailers, weekend sailboats, or any craft where space and weight are primary considerations.
How does the stainless steel water tank design improve durability in Isotemp and Isotherm systems?
The stainless steel inner tank is the foundational defense against corrosion and failure. Isotemp stainless steel marine water heaters are built to withstand the demanding marine environment for years. This robust material resists the corrosive effects of water heated and stored for long periods, unlike glass-lined or plastic tanks. The integrity of this hot water tank is backed by a strong 5-year limited warranty, reflecting trust in its longevity. Key protective features include:
- A brushed stainless steel cover for external protection.
- A safety mixing valve to prevent overheating.
- A pressure relief valve as a standard safety backup.