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How long does an oil tank typically last?

The lifespan of an oil tank can vary depending on various factors, including the material of the tank, its construction, installation, maintenance, and the environmental conditions it is exposed to. Here are some general guidelines for the typical lifespan of different types of oil tanks:

  1. Steel Tanks: Steel oil tanks are common and widely used. Their average lifespan is around 15 to 20 years. However, this can vary significantly based on the thickness of the steel, the quality of the coating or paint used to protect against corrosion, and the presence of any external factors that may accelerate corrosion.


  2. Fiberglass Tanks: Fiberglass oil tanks are known for their resistance to corrosion. With proper maintenance, they can last for 30 years or more. They are less susceptible to corrosion compared to steel tanks, but their lifespan can still be affected by other factors such as ultraviolet (UV) exposure and physical damage.


  3. Double-Wall Tanks: Double-wall oil tanks have an inner tank encased in an outer protective wall, which adds an extra layer of protection against leaks and spills. With proper maintenance and regular inspections, these tanks can last for 30 years or more.


  4. Underground Tanks: Underground oil tanks are generally more prone to corrosion and may have a slightly shorter lifespan compared to above-ground tanks. Their lifespan can range from 15 to 30 years, depending on factors such as the type of tank and the soil conditions surrounding the tank.

It's essential to remember that the lifespan of an oil tank is not a guarantee, and the actual duration can vary. Proper maintenance, regular inspections, and timely repairs can help extend the life of an oil tank. Additionally, local regulations and insurance policies may have requirements for the replacement of aging oil tanks, so it's important to stay informed about any relevant guidelines and recommendations.

If you are unsure about the age and condition of your oil tank, or if it has exceeded its expected lifespan, consider having a qualified technician inspect the tank to assess its integrity and determine if replacement is necessary to prevent potential leaks or failures.


If you are looking for a Sewage treatment system, contact us on 01388 537050 or check out our selection of oil tanks atDirect Drainage