
Mounting an outdoor fuel oil tank requires careful planning and consideration of various factors. It is important to determine the appropriate size and location for the tank, ensuring it complies with local regulations and safety standards. The tank should be placed on a stable surface, such as a concrete pad, and installed with proper piping and connections to prevent leaks and ensure safe fuel supply. Regular maintenance and inspections are crucial to mitigate corrosion and other damage caused by outdoor elements. Additionally, considerations regarding fuel type, delivery services, and disposal of old tanks are also essential aspects of the process.
Characteristics and Values of an Outdoor Fuel Oil Tank
| Characteristics | Values |
|---|---|
| Installation | Outdoor fuel oil tanks can be installed above ground or underground. |
| Placement | Tanks should not obscure building entrances or windows, and should be placed downgrade from any drinking water source. |
| Stability | Tanks should be placed on a firm surface, such as a concrete pad, with a bedding surface of natural materials like sod or bark to aid stability. |
| Size | Choose a tank that fits the capacity you need, ensuring enough space for sending, storage, and expansion of oil. |
| Safety | Tanks should be connected to a vent alarm to prevent spills, and supply lines should be protected from heavy ice, snow, or objects that could break or pinch the lines. |
| Maintenance | Regular inspections are necessary to check for corrosion, leakage, or damage. |
| Compatibility | Ensure materials and fittings are compatible with the fuel type; some tanks are only suitable for heating oil, while others may also support diesel or gasoline. |
| Regulations | Research local building codes and permits, as well as homeowner's insurance requirements, to ensure compliance with safety regulations. |
| Fuel Type | Consider the freeze point of the fuel and the potential for water contamination, which can affect performance in cold climates. |
| Disposal | Some states charge a disposal fee for oil tank removal, and permits may be required, especially for underground tanks. |
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What You'll Learn
- Choosing a location: avoid water lines, septic systems, and plants that could be damaged by leaks
- Size and capacity: ensure it has enough space for oil expansion and consider monthly deliveries
- Compatibility: check that the materials and fittings are compatible with your fuel type
- Local regulations: research building codes and contact local departments to determine permits
- Installation: level and stabilise the tank, connect pipe fittings, and get it inspected

Choosing a location: avoid water lines, septic systems, and plants that could be damaged by leaks
If you're installing an outdoor fuel oil tank, it's important to carefully choose a location that avoids certain features. Firstly, avoid installing the tank near water lines. This is because water can contaminate the oil, causing issues with freezing, especially in cold climates. Water can also cause sludge to build up, leading to potential blockages and further issues.
It is also important to avoid installing an outdoor fuel oil tank near septic systems. This is a safety precaution to prevent any potential leaks from contaminating the septic system and causing environmental damage or health hazards.
Additionally, when choosing a location for your outdoor fuel oil tank, avoid placing it near plants or shrubs that could be damaged by fuel leakage. This is crucial for preventing environmental damage and maintaining the health of your surrounding plants and vegetation.
Another important consideration is to avoid placing the tank under house eaves, where it can be subjected to falling snow or icicles. This will help prevent any unnecessary weight or pressure on the tank and reduce the risk of damage.
It is also recommended to place the tank downgrade from any drinking water sources to further reduce the risk of contamination in the event of a leak.
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Size and capacity: ensure it has enough space for oil expansion and consider monthly deliveries
When choosing an outdoor fuel oil tank, it is important to consider its size and capacity. Firstly, ensure that the tank has enough space for oil expansion. Leaving room for expansion is crucial when adding or removing fuel from the tank. This prevents issues such as clogged oil filters, which can lead to the oil burner not receiving oil and resulting in a loss of heat.
The most common size for an outdoor heating oil tank is 275 gallons. However, the actual capacity can range from 105 to 500 gallons, depending on the specific tank. When full, a 275-gallon tank typically holds around 225 gallons, with the remaining space allowing for air or debris at the bottom. Therefore, it is important to consider the actual capacity and usage when choosing a tank size.
Additionally, consider the frequency of oil deliveries. Signing up for automatic delivery services can be beneficial as the dealer is responsible for ensuring the tank does not run out of oil. This can help prevent issues such as sludge buildup, which can occur when the tank gauge drops to 1/8 full. Regular inspections and maintenance of your outdoor oil tank are also crucial to identify any signs of corrosion, leakage, or damage.
When installing an outdoor oil tank, stability is essential for safety. The bedding surface should consist of natural materials like sod or bark to enhance stability. A concrete pad is also recommended, ensuring it is large enough for the tank with room to spare. For outdoor tanks, consider building a subgrade of crushed stone to facilitate natural water drainage. Support legs are crucial for both indoor and outdoor tanks to prevent movement.
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Compatibility: check that the materials and fittings are compatible with your fuel type
Compatibility is a key consideration when installing an outdoor fuel oil tank. It is important to check that the materials and fittings are compatible with your fuel type. For instance, some tanks are designed solely for heating oil, while others may also support diesel or gasoline.
The fittings for your outdoor fuel oil tank will be determined by the type of fuel you use. Diesel fuel line fittings, for instance, are constructed from materials including brass, stainless steel, and aluminum. These materials are chosen specifically for their compatibility with diesel fuel. Brass fittings are typically used for low-pressure applications, while stainless steel fittings are used for high-pressure applications.
The type of fitting also depends on the pressure rating and the inner diameter of the hose. Compression fittings, for instance, are commonly used to connect hard fuel lines in high-pressure systems. They consist of a compression nut, body, and compression ring. Fittings with flared connections, on the other hand, have a smooth end that joins the pipe.
To ensure the safety and performance of the system, it is important to regularly inspect diesel fuel fittings for signs of wear, leaks, or corrosion. Certain combinations of materials can cause corrosion, such as using brass and stainless steel fittings together. Therefore, it is important to check for signs of corrosion and replace fittings when necessary.
Additionally, it is important to use quality oil from a reputable supplier to maintain your outdoor fuel oil tank. Using an additive can help reduce deposits, and it is recommended to replace the filter at the tank bottom outlet annually.
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Local regulations: research building codes and contact local departments to determine permits
Local regulations are a crucial aspect of installing an outdoor fuel oil tank, as they ensure safety and compliance with building codes. Here are some detailed instructions to follow regarding local regulations when planning to mount an outdoor fuel oil tank:
Research Building Codes
Before installing an outdoor fuel oil tank, it is essential to research the applicable building codes and local regulations. These regulations are designed to protect you, your property, and the environment from potential hazards associated with fuel oil storage. Contact your local authority or visit their website to access the relevant building codes and regulations specific to your area.
Contact Local Departments
Reach out to your local building and fire departments to determine the necessary permits and requirements for installing an outdoor fuel oil tank. These departments can provide guidance on safety considerations, size restrictions, installation locations, and fuel quality requirements. They can also advise on any additional permits or approvals needed, such as fire safety permits.
Understand Size and Location Restrictions
Local codes may dictate the size of the oil tank and where it can be installed on your property. For instance, there may be specific distances that must be maintained between the tank and fuel-powered equipment, property boundaries, or nearby buildings. Ensure you understand these restrictions to avoid violating any regulations.
Fuel Quality and Safety Requirements
Local regulations may also dictate fuel quality requirements and safety considerations. For example, certain jurisdictions may have specific requirements for fuel types, such as heating oil, diesel, or gasoline. Additionally, there may be mandates for vent alarms, spill prevention measures, and fire safety protocols, including the installation of fire valves or fire guards.
Planning Permission
If your property is a listed building, planning permission may be required for installing an outdoor fuel oil tank. Even if it is not a listed building, it is wise to check with your local authority to confirm if planning permission is necessary, as regulations can change over time.
By diligently researching building codes and consulting with local departments, you can ensure that your outdoor fuel oil tank installation complies with all relevant local regulations and helps prevent potential safety hazards.
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Installation: level and stabilise the tank, connect pipe fittings, and get it inspected
When installing an outdoor fuel oil tank, it is important to ensure that the tank is level, stable, and compliant with all relevant codes and regulations. Here is a step-by-step guide to installing an outdoor fuel oil tank:
Level and Stabilise the Tank
Place the tank on a level surface that can support its weight, such as a concrete slab. The ground should be prepared beforehand, especially if the tank is placed on unstable ground. It is recommended to use a bedding surface made of organic materials. Ensure that the tank is level by using a spirit level or a laser level. Adjust the surface until the tank is level. Secure the tank in place to prevent movement, especially if it is in an area prone to high winds or other adverse weather conditions.
Connect Pipe Fittings
Once the tank is level and stable, you can begin to connect the pipe fittings. The product supply lines should be installed with a downward slope to prevent water accumulation and freezing. These lines should be made of copper tubing that is at least 10mm in diameter. Ensure that all joints in the piping are fuel oil-tight by using joint compounds. The vent pipe, made of 40 black steel, should measure 2 inches in diameter and be connected to a vent alarm to prevent spills. The fill pipe should be made of the same material, be 2 inches in diameter, and extend 3 feet above the grade. Again, ensure that all joints are fuel oil-tight.
Get it Inspected
It is important to have your outdoor fuel oil tank inspected periodically to ensure it is in proper working condition and to prevent leaks. While there are no specific guidelines for how often to inspect an outdoor tank, it is recommended to inspect above-ground tanks at least once a year. Check for any signs of leaks, corrosion, or damage to the tank and its fittings. Pay close attention to the seams of the tank, as they can be prone to rust and corrosion. Ensure that the tank is secure and has not shifted, as this can cause the fittings to bend and lead to spills. Inspect the vent alarm to ensure it is functioning properly and that there is no evidence of overfilling.
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Frequently asked questions
Installing an outdoor fuel oil tank offers peace of mind by storing your tank outside of your home.. It also provides safety benefits in the event of an oil leak or fire, especially if you have children or pets. However, outdoor tanks are susceptible to the weather and are at a higher risk of rust, pitting, and other forms of damage. They are also more expensive to remove than indoor tanks.
First, check local regulations and obtain any necessary permits. Then, choose a tank that fits your capacity needs and is rated for outdoor usage. Pick a safe location in your yard that is flat and can support the weight of a full oil tank, avoiding water lines, septic systems, and plants or shrubs that could be damaged by fuel leakage. Prepare the installation site by pouring a concrete pad centred on the tank with room to spare, and building a subgrade of crushed stone to aid in natural water drainage. Once the tank arrives, ensure it is level and stable, and connect all pipe fittings to their proper locations according to local codes and regulations.
Regularly inspect your tank for signs of corrosion, leakage, or damage, as these can lead to costly repairs or replacements. Ensure that your tank is securely positioned and levelled to handle its fuel load without any problems. Check that the bedding surface consists of natural materials like sod or bark to aid in stability and prevent movement.
Install supply line covers to protect your lines from heavy ice, snow, or other objects that could break or pinch the lines, releasing oil. Product supply lines should be installed on a downward slope to prevent the accumulation of water and subsequent freezing. The tank should also be tipped back away from the delivery pipe to allow water to collect away from the supply side.











































