Katerina Swanson
Connecting two fuel oil tanks is a process that requires careful consideration and adherence to local codes and standards, such as NFPA 31. The tanks should be protected from weather and physical damage, especially in areas prone to flooding. The tanks should also be securely supported by rigid, non-combustible supports to prevent settling, sliding, or lifting. When connecting the tanks, it is important to consider the size of the openings and use appropriate fittings, such as double-tap bushings and street 90s. The fill line typically goes into the first tank, while the vent, vent alarm, and gauge are connected to the second tank. To equalize the fuel level between the tanks, a loop can be installed at the top, connecting both tanks with a pipe.
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What You'll Learn
Using a T to tie the two tanks into one line
To tie two fuel oil tanks into one line, you can use a T or tee joint. This is a standard method for connecting two oil tanks. The tee joint will connect the two bottom tappings of the tanks together. It is important that the tanks are similar in size and are level and at the same height to help them equalize.
The process of connecting the tanks will also involve using pipes and fittings of the correct sizes. The openings in the tanks will typically be 2", so you will need to use pipes and fittings that match this size. For example, you may need to use 2" x 1.5" double tap bushings, 1.5" street 90s, and a 1.5" blk union. The fill goes into the first tank, and the vent, vent alarm, and gauge go into the second tank.
It is also important to consider the slope of the tanks. If you are drawing from the openings at the bottom of the tanks, you will need to slope the tanks toward the holes. This will allow any moisture and crud to flow to the filter and be removed, preventing corrosion.
In addition to the tee joint and pipes, you will also need to install valves and filters in each tank. This will allow for proper drainage and maintenance. Make sure to follow local codes and regulations, such as NFPA 31, when installing and maintaining your fuel oil tanks.
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Connecting the tanks manifold style
Connecting two fuel oil tanks manifold style involves using pipes, valves, and a filter to allow the tanks to work together. This setup provides several benefits, such as the ability to equalize fuel levels between the tanks and the convenience of having a backup fuel supply.
To connect the tanks, you will need the following materials: 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. You will also need to ensure that the tanks are securely mounted on a level surface to prevent any movement that could damage the pipes.
The process begins by installing the fill line into the first tank. This is typically a 2" filler, although the size may vary depending on the tank's openings. The fill line is then connected to the second tank using the appropriate pipes and fittings. A vent line is also installed, with a vent alarm and gauge, into the second tank. This ensures that any moisture or air can escape, preventing corrosion and maintaining the fuel quality.
Additionally, a loop can be installed at the top to connect both tanks. This loop helps equalize the fuel level between the tanks, ensuring that they remain at the same level. It is important to ensure that the tanks are at equal footing to allow for accurate fuel level equalization.
When connecting the tanks, it is crucial to follow local codes and regulations, such as the NFPA 31 standards, which specify requirements for protecting the tanks from weather and physical damage. Consulting with a professional plumber or fuel supplier is recommended to ensure that the setup complies with safety standards and to fine-tune the details of the installation.
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Using a loop to connect the tanks
Another user describes their setup, which includes a loop connecting the tops of both tanks, approximately 4" above the tank tops. The loop is made of 1-1/2" galv pipe, and its purpose is to equalize the fuel level between the tanks. The tanks are on equal footing, and each has a level indicator. The fill line, air escape, and whistle are present, but their exact configuration is unclear. The fill goes into the first tank, and the vent, vent alarm, and gauge go into the second.
A soft copper link with a small loop instead of a straight length is also mentioned as a successful method of connecting two oil tanks. The loop provides extra give, which is beneficial in certain situations.
When connecting the tanks with a loop, it is essential to consider the local codes and regulations, such as the NFPA 31 standards, which specify requirements for protecting outdoor tanks from weather, physical damage, and flooding. Additionally, the size of the openings in the tanks will dictate the specific parts needed for the connection. For example, if the openings are 2", you will need 2x1.5 double tap bushings, 1.5" street 90s, a 1.5" blk union, and enough 1.5 blk pipe and nipples to connect the tanks.
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Ensuring the tanks are protected from weather and physical damage
Fuel oil tanks should be protected from weather and physical damage to ensure their longevity and safety. Firstly, consider the placement of the tanks. They should be installed in a sheltered location, away from direct ground moisture and extreme temperature fluctuations. Proper drainage, elevation, and protection from physical impacts like flooding are crucial to maintaining the integrity of the tanks. For instance, in areas prone to flooding, tanks should be securely supported by rigid, non-combustible supports to prevent settling, sliding, or lifting.
To protect against weather damage, it is recommended to keep the tanks at least half-full during the summer to prevent interior condensation, which could lead to rust and other unseen damage. Additionally, positioning the tanks in a shaded area or constructing a simple structure to shield them from direct sunlight can reduce the risk of overheating and pressure buildup.
For tanks that are exposed to sunlight, consider using tanks with UV inhibitors to prevent UV rays from permeating the structure and causing fuel degradation. Proper installation is also vital. All oil tanks should be installed on a flat, level, and fire-resistant base capable of supporting the weight of the tank when full. Concrete slabs, if used, should be at least 50mm thick and extend beyond the widest points of the tank to provide full support.
To protect against physical damage, consider installing a bunded tank, also known as a double-skinned oil tank. This type of tank provides an extra layer of protection against leaks and spills. Regular maintenance and inspections are also crucial to identifying early signs of corrosion, structural weakening, or potential leak risks.
Lastly, consider security solutions to protect against vandalism and theft, such as security alarms, specialist tank locks, and outside lights.
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Sourcing the right equipment
- Tanks and Tank Placement: The first step is to choose the right tanks for your needs. Consider the capacity required, the type of fuel to be stored, and any specific regulations or standards that apply in your location. For outdoor tanks, ensure they are protected from weather damage and potential flooding by placing them on a secure, rigid, and non-combustible platform, as per NFPA 31 standards. If your tanks are to be placed indoors, ensure proper ventilation and follow local building codes.
- Piping and Fittings: The piping and fittings you choose will depend on the tank configuration and the desired flow of fuel between the tanks. Black pipe and soft copper piping are commonly used. For connecting the tanks, you may need various fittings such as double-tap bushings, street 90s, unions, nipples, and tees. Ensure the piping and fittings match the size of the openings in your tanks (commonly 2" or 1.5" in diameter).
- Ventilation and Gauge Equipment: Proper ventilation is crucial for fuel oil tanks. Each tank typically requires a vent, with a minimum size requirement (e.g., 1.5" or larger). Additionally, consider installing a vent alarm and gauge equipment to monitor fuel levels and pressure.
- Filtration and Moisture Control: Fuel oil tanks should have a filtration system to remove impurities. Each tank should have a bowl with a filter that needs to be changed regularly. To address moisture buildup, slope the tanks toward the filter openings to ensure any water or moisture flows toward the filters and can be removed, preventing corrosion and acid formation.
- Safety Equipment: Follow local regulations and industry standards for safety equipment. This may include items such as level indicators, pressure relief valves, and overfill protection devices. Consult with a professional or refer to industry guidelines to ensure your setup includes the necessary safety features.
- Consultation with Professionals: While some equipment may be readily available at hardware stores or plumbing suppliers, it is always recommended to consult with a professional before sourcing equipment. Local plumbing contractors, fuel suppliers, and heating specialists can provide valuable advice and fine-tune your equipment choices based on their expertise and experience.
Remember, the specific equipment required will vary depending on your unique setup, so it is essential to carefully plan and seek expert advice where necessary.
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Frequently asked questions
You will need to connect the tanks using piping. The fill goes into the first tank, and the vent out of the second. The tanks should be on equal footing to ensure the fuel level is equalized between both tanks.
You can use black pipe or soft copper piping. Black pipe is stronger and more professional-looking, but it requires special equipment to thread and is time-consuming. Soft copper is more flexible and can help keep the oil in the tanks if they are moved or knocked.
You must ensure the tanks are protected from weather and physical damage. If they are in an area that is known to flood, they should be raised and securely supported by rigid, non-combustible supports to prevent settling, sliding, or lifting.
No, turning off the second tank will not save fuel. The oil tanks simply provide fuel to your heater and do not affect the rate at which oil is consumed.
