Propane Gas Tank Sizes & Costs: What You Need To Know

Choosing the right propane tank size is crucial for efficient and cost-effective home use. Propane is a reliable fuel for various applications, but selecting an appropriate tank size ensures optimal performance. This guide provides essential information on propane, safety considerations, tank sizes, and their respective uses. Understanding these factors will help you make an informed decision and meet your specific residential needs.

What is Propane?

Propane, also known as liquefied petroleum gas (LPG), is a colorless, odorless, and non-toxic gas utilized for residential purposes such as furnaces, water heaters, and cooking. Despite its non-toxic nature, propane is highly flammable, and an odorant is added to so you can smell it in the event of a leak.

Propane gas tank sizes typically range from 8 gallons up to 2000 gallons.

What You Need to Know About Propane Gas Tanks

1. Capacity: If you are new to propane, it’s essential to understand that a propane tank can only be filled to 80% of its capacity as a safety precaution. This allowance accounts for gas expansion when temperatures rise, and many propane gas tank sizes incorporate a safety flapper valve to prevent exceeding this limit.

2. Tank Recertification: Stationary propane tanks are mandated by the Department of Transportation (DOT) and the National Fire Protection Association (NFPA) to undergo periodic recertification. The initial recertification occurs twelve years from the manufacturing date and every five years thereafter.

3. Building Codes: For underground propane tanks, a minimum distance of 10 feet from buildings, properties, and traffic is required to comply with building codes.

4. Fill Pricing: Propane companies typically sell propane by the pound or gallon, and it’s crucial to be aware that one gallon of propane equals 4.2 lbs.

Propane Gas Tank Sizes

– 20 lb Tank:

  • Measures 18″ tall and 12″ in diameter
  • Holds 5 gallons of propane
  • Portable and commonly used for barbecue grills
  • Price Range (empty): $35-$50

– 33 lb Tank:

  • 2 feet tall and 1 foot in diameter
  • Holds about 8 gallons of propane
  • Portable and suitable for barbecue grills and propane heaters
  • Price Range (empty): $50-$60

– 100 lb Tank:

  • 4 feet tall and about 20″ in diameter
  • Holds approximately 25 gallons of propane
  • Portable with assistance and commonly used in residential appliances, RVs, and motorhomes
  • Price Range (empty): $120-$150

– 120 lb Tanks:

  • 5 1/2 feet tall and 2 feet in diameter
  • Holds about 30 gallons of propane at 80% capacity
  • Suitable for homes with two to three LP gas appliances
  • Not transportable but can be permanently fixed to mobile homes
  • Price Range (empty): $400-$520

– 420 lb Tank:

  • Holds about 100 gallons of propane at 80% capacity
  • Approximately 4 feet tall and 3 feet in diameter
  • Commonly used for home heating, dryers, fireplaces, pool heat, and water heaters
  • Price Range (empty): $600-$750

– 325 Gallon Tank:

  • 9’11” in length and 30″ in diameter
  • Ideal for larger homes with predominantly LP gas appliances
  • Price Range (empty): $1,200-$1,300

– 500 Gallon Tank:

  • Holds about 400 gallons at 80% capacity
  • Suitable for homes with 2500-4500 square feet
  • Can be placed above or below ground
  • Price Range (empty): $1,600-$1,700

– 1,000 Gallon Tank:

  • Ideal for large homes using gas furnaces as the primary heat source
  • Suitable for businesses, ranch-style homes, farmers, or high propane consumption
  • Price Range (empty): $2,500-$2,600

Selecting the right propane gas tank size depends on your specific application. Smaller tanks are suitable for outdoor appliances and RVs, while larger tanks, such as the 1,000-gallon tank, are ideal for substantial heating needs and extensive propane usage throughout the year.

At Alabama Propane Exchange, we are here to help with all of your propane questions and needs.


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