
If you're looking to increase your vehicle's driving range, installing an RDS auxiliary fuel tank can be a great solution. RDS offers auxiliary fuel tanks that can be used to add extra capacity to your factory tank with the help of an RDS diesel install kit. These tanks are made of durable aluminum and are designed to meet DOT standards, ensuring safety and reliability. The installation process can vary depending on your vehicle, but many users have reported that the RDS diesel install kit makes the process straightforward, with clear instructions and high-quality components.
RDS Auxiliary Fuel Tank Characteristics and Values
| Characteristics | Values |
|---|---|
| Use | Increase driving range |
| Capacity | 60 gallons |
| Compatibility | Trucks, boats, generators, pressure washers |
| Kit Installation | Easy, quick, and vertical |
| Kit Contents | Vented fill cap, dual withdrawal tubes, couplers, grommets |
| Fit | Perfect, with extra materials provided |
| Instructions | Clear with matching photos |
| Time Taken | 2 hours |
| Performance | Works great, no issues |
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What You'll Learn

RDS MFG INC 11025 Diesel Install Kit
The RDS MFG INC 11025 Diesel Install Kit is designed to connect your RDS auxiliary or RDS transfer diesel fuel tank to your truck's fuel fill hose. The kit contains the necessary items to connect your RDS tank to your OEM fuel tank economically and easily. It is compatible with various truck models, including Ford, Dodge, and Chevy/GMC, with gravity-fueled auxiliary fuel tanks.
Before installing the kit, it is important to note that the manufacturer recommends against using white Teflon tape to seal the fittings as diesel fuel or gasoline can wick through it, leading to leaks. Instead, a recommended product is 'Permatex 80632 Thread Sealant with PTFE'.
The installation process involves cutting the filler neck hose, which can be done using an oscillating cutting tool. The kit includes couplers that can be used to connect the fuel lines. It is important to ensure that the fill valve is installed as vertically as possible to function correctly and prevent fuel loss. The kit also includes a breather valve that should be placed facing upwards to minimise the chance of splashing diesel.
The RDS MFG INC 11025 Diesel Install Kit has received generally positive reviews from customers who found it easy to install and appreciated the clear instructions and high-quality parts. However, some customers reported issues with the fit of the kit and suggested improvements, such as including a grommet for the bed and providing better instructions or a video. Overall, the kit is a good option for those seeking an economical and straightforward solution to connect their RDS auxiliary fuel tank to their vehicle's fuel system.
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Cutting the filler neck hose
First, it's important to understand the context of this step. The filler neck hose is a crucial component that connects the fuel filler neck to the fuel tank. It allows fuel to flow smoothly into the tank during refuelling. When installing an RDS auxiliary fuel tank, you may need to cut the filler neck hose to accommodate the new tank's positioning and configuration.
To begin the cutting process, you'll need the right tools. A standard sheetrock knife or hacksaw blade won't suffice for this task. Instead, opt for a more robust and specialized tool like an oscillating cutting tool. This tool will provide the necessary power and precision to cut through the hose effectively.
Before making any cuts, it's crucial to measure and mark the hose accurately. Determine the exact location where the cut needs to be made by referring to the installation instructions or consulting a professional. Mark the cutting line clearly to ensure a straight and precise cut. Take your time during this step to avoid any mistakes, as an inaccurate cut could compromise the hose's function.
Once the measurements and markings are in place, it's time to use the oscillating cutting tool. Carefully align the blade with the marked cutting line and begin the cutting process. Apply steady pressure and follow the marked line closely to ensure a straight and clean cut. Take your time during this step to avoid any uneven edges or jagged cuts that could affect the hose's performance.
After successfully cutting the filler neck hose, it's important to handle the freshly cut edges with care. Ensure that you don't damage or distort the shape of the hose near the cut area. You may also need to install a grommet to protect the hose, especially where it passes through the truck bed. This adds an extra layer of protection and helps maintain the integrity of the hose.
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Installing the T in a vertical position
When installing an RDS auxiliary fuel tank, it is important to ensure that the T in the filler line is positioned correctly. The correct positioning of the T will ensure that the ball valve functions properly and stops the fuel flow from the auxiliary tank when needed.
One user who installed an RDS auxiliary fuel tank in their 2004 F-250 truck recommends installing the T in a vertical position. They adjusted the T to a position slightly before 10:00, which was successful in forcing the ball valve up to stop the fuel flow. This user also used a grommet to protect the hose going through the bed.
Another user installing an ATI 60-gallon tank in their truck mentions that the orientation of the check valve (a type of rollover valve) is important for its function. The valve has a ball that floats and cuts off the fuel flow when it rises to a certain level. Therefore, the check valve must be installed in an upward orientation.
When installing the T in a vertical position, it is crucial to consider the available space in your vehicle. In the case of the 2004 F-250 truck, the user noted that there was not much room under the bed for the unit, which made cutting the filler neck hose particularly challenging. They used an oscillating cutting tool to cut the hose successfully.
Overall, installing the T in a vertical position at around the 10:00 position is recommended for ensuring the proper functioning of the ball valve and optimising the performance of your RDS auxiliary fuel tank. Remember to refer to the installation instructions and take the necessary precautions when working with fuel systems.
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Using a grommet to protect the hose
To protect the hose going through the bed of your truck, it is recommended to use a grommet. This is a small ring-shaped object, usually rubber, that is inserted into a hole to protect the hose from chafing or cutting. In the context of installing an RDS auxiliary fuel tank, the grommet is used to protect the fuel hose as it passes through the truck bed.
When installing an RDS auxiliary fuel tank, it is important to consider the protection of the fuel hose. The hose carries the fuel from the tank to the engine, and it needs to be protected to prevent leaks and ensure the safe and efficient operation of the fuel system.
One common method to protect the hose is to use a grommet. A grommet is a small ring-shaped object, typically made of rubber or plastic, that is inserted into a hole to protect the hose. In this case, the grommet is placed in the hole where the fuel hose passes through the truck bed.
The grommet acts as a cushion and guide for the hose, preventing the hose from rubbing against the edges of the hole. This is important because, over time, the friction and vibration can cause the hose to wear and eventually leak. The grommet also helps to keep the hose in place, reducing the risk of kinks or bends that could restrict fuel flow or damage the hose.
When installing a grommet to protect the hose, it is important to choose the correct size and material. The grommet should fit snugly around the hose, with enough flexibility to allow the hose to move slightly. It should also be made of a material that is compatible with the fuel type and resistant to degradation over time.
In addition to using a grommet, it is also important to ensure that the hole through which the hose passes is smooth and free of sharp edges. This can be achieved by using the proper tools to cut the hole, such as a hole saw or a utility knife, and by filing down any rough edges after cutting. By taking these precautions, you can help ensure the longevity and safety of your RDS auxiliary fuel tank installation.
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Drilling hole locations
First, it is important to take the necessary measurements and plan the layout of the fuel tank carefully. Identify the exact location where the tank will be placed and mark the areas where holes need to be drilled. This may involve measuring and remeasuring to ensure accuracy. Take into account the space available and any obstacles or existing components that may interfere with the installation.
The drilling of holes should be done with precision. Use the appropriate tools, such as a power drill with the correct drill bit size, to create holes that align perfectly with the fuel tank's fittings and attachments. It is crucial to maintain the structural integrity of the vehicle or equipment on which the fuel tank is being installed, so be mindful of the surrounding areas when drilling.
In some cases, you may need to cut back rubber hoses or adjust the filler neck hose to accommodate the fuel tank. This can be a challenging task, and specialized tools like an oscillating cutting tool may be required. It is important to consult experts or seek guidance from experienced individuals if you are unsure about the drilling locations or the cutting process.
When drilling the holes, it is essential to follow the manufacturer's instructions provided with the RDS auxiliary fuel tank. These instructions should outline the specific requirements and recommendations for drilling, including the number, size, and placement of the holes. Following these instructions carefully will ensure a proper installation that meets the manufacturer's standards.
Finally, once the holes are drilled, take the time to double-check their alignment and ensure they are in the correct positions. This attention to detail will ensure a seamless installation process and prevent any issues that may arise from misaligned holes. It is always better to take the necessary time to get this step right rather than rushing and risking errors.
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Frequently asked questions
An RDS auxiliary fuel tank is a tank that can be used to increase the driving range of your vehicle. They are made in the USA and meet DOT standards.
The RDS auxiliary fuel tank kit includes a manual sight gauge, baffles to reduce sloshing, drain fittings, and a vented fill cap. It also comes with dual withdrawal tubes, the second of which can be used for diesel applications as a fuel return.
The installation process will vary depending on your vehicle. It is recommended that you refer to the manufacturer's instructions for guidance. Some people have reported the process taking up to two hours.
RDS auxiliary fuel tank kits can be purchased online from retailers such as Amazon.com and directly from the RDS website.











































