Mercedes Mullins
There are various methods for connecting two fuel oil tanks together, and the best method depends on the specific use case and local regulations. Some common methods include using a 'T' connector in the fuel lines, installing a soft copper link, or tying the tanks together with shut-off valves. It is important to consider factors such as flooding risk, fuel gauge functionality, and local regulations when deciding how to tie fuel oil tanks together.
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What You'll Learn
Using a T-shaped connector to tie fuel oil tanks together may cause issues
While tying fuel oil tanks together, it is important to consider the potential issues that may arise when using a T-shaped connector. One of the main concerns is flooding, which can cause the tanks to float and bob around, potentially leading to a fuel spill. This issue was highlighted by a user who experienced a severe flood due to an ice jam and witnessed their fuel oil tanks becoming displaced. To mitigate this risk, it is recommended to protect the tanks from flooding by following the NFPA 31 standards, which include securing the tanks with rigid, non-combustible supports to prevent settling, sliding, or lifting during a flood.
Another issue to consider when using a T-shaped connector is the equalization of fuel levels between the tanks. It is important to ensure that the tanks are similar in size and are level at the same height to facilitate proper equalization. Additionally, the use of a single filter in the T-shaped connector setup can lead to problems if it becomes plugged, preventing the fuel levels from equalizing. To address this, it is recommended to have separate filters for each tank or to consult a local plumbing contractor or fuel supplier for advice.
The use of rigid pipes to tie the outlets of the fuel oil tanks together should also be avoided. Rigid pipes do not allow for any movement or flexibility, which can be problematic if the tanks settle or shift. Instead, it is recommended to use at least 1/2" OD copper pipes or swing joints, which provide more flexibility and can accommodate any changes in the positioning of the tanks.
Furthermore, when using a T-shaped connector, it is crucial to consider the positioning of the filler and vent pipes. It is generally recommended to place the filler in the higher tank and the vent in the lower tank, ensuring that the vent is the highest point in the system. This setup helps prevent water or sediment from entering the exit line and potentially blocking it. Additionally, by keeping the crossover as low as possible and having a full-size vent, pressure build-up can be avoided.
In conclusion, while using a T-shaped connector to tie fuel oil tanks together may seem straightforward, there are several potential issues to consider. By following the advice and recommendations provided, such as protecting the tanks from flooding, ensuring proper equalization of fuel levels, avoiding rigid pipes, and positioning the filler and vent pipes correctly, these issues can be mitigated. However, it is always advisable to consult with appropriate professionals when making potentially dangerous or financial decisions.
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The use of a loop connector can equalise fuel levels
Fuel tanks can be tied together using a loop connector to equalise fuel levels. This is achieved by installing a loop of pipe at the top of the tanks, connecting one to the other. The loop connector ensures that the fuel levels in both tanks remain balanced, allowing for a consistent supply of fuel from a single fill point.
The process of tying fuel oil tanks together using a loop connector typically involves the following steps:
- Planning: Determine the size and location of the tanks, ensuring they are on equal footing and allowing for proper ventilation.
- Fill and Vent Piping: Install a fill pipe into the first tank, ensuring it meets the required diameter, typically 2 inches. Then, install a vent pipe in the second tank, positioned at the highest point in the system.
- Loop Connector Installation: Measure and cut the pipe for the loop connector to the appropriate size, typically 1 to 2 inches in diameter. Thread or weld the pipe to create a secure connection between the tanks, positioned approximately 4 inches above the tank tops.
- Level Indicators: Install level indicators on each tank to monitor fuel levels and ensure the loop connector is functioning properly.
- Vent Alarm and Whistle: Determine if the vent alarm, whistle, and gauge are installed on the same tank or separated. These components are crucial for safe and proper tank operation.
The use of a loop connector offers several advantages. Firstly, it simplifies the filling process by allowing fuel to be added to one tank, which then automatically equalises the fuel level in the second tank. This reduces the time and effort required for filling multiple tanks individually. Secondly, the loop connector provides flexibility in fuel management, ensuring a consistent fuel supply by drawing from both tanks simultaneously. This is particularly beneficial in scenarios where fuel delivery may be restricted, such as during winter or in areas with challenging access. Additionally, the loop connector enhances the overall safety of the fuel storage system. By maintaining equal fuel levels, the risk of imbalanced tanks and potential overflow or leakage is mitigated.
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Local codes and NFPA standards must be considered
It is important to consult local plumbing contractors and fuel suppliers to ensure compliance with local codes and NFPA standards. These professionals can provide guidance on specific requirements and help fine-tune the setup to meet local regulations. In some cases, local codes may require a minimum vent size of 1.5 inches and specify the placement of vents and fill lines in relation to the tank openings.
When tying fuel oil tanks together, it is crucial to consider the potential for flooding, especially if the tanks are located in an area known to flood. Soft copper links between tanks can provide flexibility and help prevent oil spills during floods. Additionally, using a small loop instead of a straight length can allow for extra give and better accommodate movement during flooding.
It is worth noting that local codes and NFPA standards may vary depending on the region and specific circumstances. Therefore, it is essential to consult with local authorities, contractors, or professionals familiar with the local regulations to ensure compliance and safe installation.
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Soft copper links can help prevent flooding damage
Fuel oil tanks can be tied together using various methods, such as cross-connecting the vents or using a fill pipe for each tank. One key consideration when tying fuel oil tanks together is the potential risk of flooding. Soft copper links can play a crucial role in preventing flooding damage to fuel oil tanks.
Soft copper links offer flexibility and adaptability when connecting fuel oil tanks. They provide a more flexible alternative to hard steel pipes, allowing for some give in the event of flooding. This flexibility can help to maintain the integrity of the tank connection during periods of high water or flooding.
In the event of a flood, the buoyancy of the tanks can cause them to move or "bob around." Soft copper links can provide some extra give, helping to keep the tanks securely connected. This reduces the risk of oil spills or leaks, which could have significant environmental and financial impacts.
Additionally, soft copper links can help to protect the tanks from physical damage caused by flooding. The soft copper allows for some movement of the tanks without compromising the connection. This can be particularly important in areas prone to flooding or where there is a known risk of ice jams or similar events that can cause rapid and intense flooding.
It is worth noting that while soft copper links offer benefits in terms of flexibility and flood protection, it is essential to follow local codes and regulations when installing fuel oil tanks. NFPA 31 standards, for example, specify that tanks must be protected from weather and physical damage and securely supported to prevent settling, sliding, or lifting during a flood. By combining soft copper links with proper installation and adherence to safety standards, homeowners can effectively prevent flooding damage to their fuel oil tanks.
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The positioning of the filler and vent is important
It is also important to consider the size of the filler and vent openings. The filler opening should be at least 2 inches, while the vent opening should be a minimum of 1.5 inches. These openings should be checked and fine-tuned by a local plumbing contractor or fuel supplier.
In some cases, a "'T'" connection may be used to tie the tanks together. However, this method can cause issues when one tank runs out of fuel before the other, as it will start sucking air into the fuel lines. To avoid this problem, fittings can be installed at the bottom of each tank to tie them together.
When dealing with dual fuel tanks, it is important to consider the fuel gauge and sending unit. If the fuel gauge is not working for one of the tanks, tying them together may not provide an accurate reading of the fuel level in both tanks. In such cases, it is recommended to fix or replace the sending unit before tying the tanks together.
Overall, the positioning and setup of the filler and vent play a crucial role in ensuring the proper functioning and safety of tied fuel oil tanks.
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Frequently asked questions
It is recommended to use a 1/2 inch flare to connect the two tanks together. Soft copper piping is also a good option, as it provides flexibility and can help prevent damage in the event of a flood.
It is important to address the issue with the fuel gauge and try to fix it. Tying the tanks together may work as a temporary solution, but it is illegal for gas-powered vehicles, as they are required to have a selector switch.
You will need two 2x1.5 double tap bushings, two 1.5 street 90s, a 1.5" blk union, and enough 1.5 blk pipe and nipples to connect the tanks.
Tying fuel oil tanks together allows for a continuous fuel supply and can help balance the fuel level between the tanks.
