RINNAI FOT-103 Extension Kit 39.6

( Brand: Rinnai ), ( Manufacturer Part Number: FOT-103 ), ( Type: Tankless Water Heater/boiler ), ( Unit Type: Unit )

Review RINNAI Extension Kit Inch To 39.6 Part Number

The Rinnai FOT-103 Extension Kit, model number 21-39.6, is an essential accessory for those who own a Rinnai tankless water heater and are in need of additional capacity. This extension kit allows you to connect an additional Rinnai FG-35 or FG-45 tankless gas water heater, enabling you to expand your hot water supply to accommodate larger households or increased demand for hot water.

The extension kit comes with all necessary components for a seamless installation process. It includes a pair of Type K thermocouples, a 36-inch long PVC vent pipe, a pair of 12-inch long PVC vent connectors, a pair of 12-inch long CPVC water connectors, and a pair of 12-inch long PEX water connectors. These connectors ensure a secure and leak-free connection between the existing and new water heater units.

The extension kit is designed to integrate seamlessly with the Rinnai FOT-103 control module, allowing you to manage both water heaters from a single location. The control module is equipped with advanced features like temperature control, safety lockout, and diagnostic functions, ensuring reliable and efficient hot water production.

The vent pipe in this extension kit is made of PVC material, which is lightweight, flexible, and resistant to corrosion. PVC venting is a popular choice in residential applications due to its ease of installation and cost-effectiveness. The CPVC and PEX water connectors ensure a durable and long-lasting water connection between the two water heaters.

This extension kit is compatible with Rinnai tankless water heaters with a model number that includes the letter "T" or "N," indicating that they are built for outdoor installation. It is essential to follow the manufacturer's installation instructions carefully and ensure all connections are made securely to avoid any potential safety hazards.

In conclusion, the Rinnai FOT-103 Extension Kit, model number 21-39.6, is an excellent investment for those who require additional hot water capacity in their households. This kit offers a simple and cost-effective solution for expanding your existing Rinnai tankless water heater system, providing you with the peace of mind that comes with reliable and efficient hot water production.

Rinnai FOT-103 Extension Kit 21: A Detailed Analysis of Its Pros and Cons

The Rinnai FOT-103 Extension Kit 21 is designed to expand the capacity of Rinnai's tankless water heaters. This accessory can be a valuable addition for households that require more hot water or larger spaces. In this analysis, we will discuss the key advantages and disadvantages of investing in the Rinnai FOT-103 Extension Kit 21.

1. Increased hot water capacity: The primary benefit of the extension kit is the ability to increase the hot water capacity of your Rinnai tankless water heater. This can be particularly useful for larger households or businesses that require a higher demand for hot water.

2. Energy savings: By providing an increased hot water supply, the extension kit can help reduce the overall energy consumption of a household or business. This is due to the fact that the water heater does not have to constantly reheat water that is not being used.

3. Space savings: Traditional tank water heaters require a significant amount of space for the storage of hot water. By using a tankless system with an extension kit, you can save valuable space in your home or business.

4. Durability: Rinnai is known for producing high-quality, durable water heaters and accessories. The extension kit is no exception, and it is built to last.

1. Cost: The Rinnai FOT-103 Extension Kit 21 comes with a higher price tag than some other water heater accessories. However, the increased hot water capacity and energy savings may offset the initial investment over time.

2. Installation complexity: Installing the extension kit may require professional assistance, which can add to the overall cost of the project. Additionally, the installation process may take longer than installing a traditional tank water heater.

3. Compatibility: The extension kit is only compatible with certain Rinnai tankless water heaters, so it may not be an option for all users.

The Rinnai FOT-103 Extension Kit 21 offers several advantages, including increased hot water capacity, energy savings, space savings, and durability. However, it also comes with some disadvantages, such as a higher cost, installation complexity, and limited compatibility. Ultimately, the decision to invest in the extension kit will depend on the specific needs and circumstances of your household or business. If you require a higher demand for hot water and have the budget for the investment, the Rinnai FOT-103 Extension Kit 21 can be a valuable addition to your tankless water heating system.

For households or businesses that require a higher demand for hot water and have the budget for the investment, the Rinnai FOT-103 Extension Kit 21 can be a worthwhile investment. It offers several advantages, including increased hot water capacity, energy savings, space savings, and durability. However, it is important to consider the compatibility of the extension kit with your existing Rinnai tankless water heater and the potential installation complexity and cost. Consulting with a professional plumber or Rinnai representative can help you make an informed decision about whether the extension kit is right for your needs.

Details:

The Rinnai Extension Kit, part number FOT-103, is a unit designed for tankless water heaters and boilers. The unit quantity is one, making it a convenient and efficient solution for enhancing heating cooling systems. It allows for an extension of 21 to 39.6 and is specifically manufactured by Rinnai. This kit is essential for expanding the size of a tankless water heater system to accommodate increased hot needs in home or garden.

part #: fot103 prices

• $149.95-$315.88

specifications wateheat:

• brand: Rinnai
• mpn: Fot-103
• type: Tankless Water Heater/boiler
• unit type: Unit

offer wateheat:

• started: June 4, 2025
• options: Ship-to-home
• sold: 0
• availability: In Stock
• quantity: 1

general wateheat:

• Heating, Cooling Air > Water Heaters > Tankless Water Heaters
• condition: New

shipping wateheat:

• carrier: FedEx
• transit: 3-9 Days
• class: Economy
• type: Fixed
• service: FedEx Ground Economy
• cost: $7.37

returns wateheat:

• policy: No Returns

payments wateheat:

• credit card: Diners-club
• other
• wallet: Google-pay

seller wateheat:

• rating: 100.0%
• city: Ukiah, California
• # reviews: 10

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