Save $600.00Used120 UnderGround Propane Tank ASME
Sold empty - no gas included
$1,300.00$700.00
120 Gallon Propane Tanks for Sale
4 tanks in stock, from $700.00. Factory direct, delivered nationwide.
A 120 gallon tank is the smallest stationary size most buyers consider for a home: enough for a single appliance such as a range, fireplace, water heater or pool heater without a delivery truck every few weeks.
Small residential applications, supplemental heating, fireplaces, and pool heaters. A great option for homes with low to moderate propane usage.
Save $600.00Used
120 Gallon Above Ground ASME Steel Propane Tank
Sold empty - no gas included
$915.00
Save $625.00420 lbs (120 Gallon) Propane D.O.T. Tank
Sold empty - no gas included
$1,650.00$1,025.00
Save $270.00420 lbs (120 Gallon) ASME Propane Tank
Sold empty - no gas included
$1,365.00$1,095.00
120 gallon propane tank prices
Every 120 gallon tank we sell, with its price and the fixed-price installation add-on where one is offered. Delivery is a flat $350.00 on top, shown at checkout.
| Tank | Type | Condition | Price | Installation add-on | Tank + installation |
|---|---|---|---|---|---|
| 120 UnderGround Propane Tank ASME | Underground | Used / refurbished | $700.00 | $1,600.00 | $2,300.00 |
| 120 Gallon Above Ground ASME Steel Propane Tank | Above ground | New | $915.00 | $850.00 | $1,765.00 |
| 420 lbs (120 Gallon) Propane D.O.T. Tank | Above ground | New | $1,025.00 | $850.00 | $1,875.00 |
| 420 lbs (120 Gallon) ASME Propane Tank | Above ground | New | $1,095.00 | $850.00 | $1,945.00 |
Underground installation includes the excavation, bedding and backfill in standard ground. Permits, gas line beyond 25 ft and the first propane fill are not included; see how much a propane tank costs for the full breakdown.
What is a 420 lb propane tank?
Tanks of this size are often sold by their nominal propane capacity rather than in gallons. NFPA 58 treats a container of 1,000 lb water capacity as a nominal 420 lb propane container, and that is the 120 gallon class - so a "420 lb propane tank" and a "120 gallon propane tank" are the same size. Our 420 lb listings are the ASME and DOT versions of the 120 gallon tank.
Capacity is quoted as water capacity. Tanks are filled to about 80%, so a 120 gallon tank holds roughly 96 gallons of propane.
120 gallon propane tank - common questions
- How much does a 120 gallon propane tank cost?
- Our 120 gallon propane tanks (4 listed) are priced from $700.00 to $1,095.00, depending on whether the tank is above ground or underground and whether it is new or used. The table on this page shows each tank with its optional installation add-on.
- How big is a 120 gallon propane tank?
- A 120 gallon tank measures about 52" H x 30" D and weighs about 680-720 lbs when full. Dimensions vary a few inches between manufacturers.
- How much propane does a 120 gallon tank hold?
- Tank capacity is quoted as water capacity. Tanks are filled to about 80%, so a 120 gallon tank holds roughly 96 gallons of propane.
- Should I buy an above ground or underground 120 gallon propane tank?
- Above ground tanks cost less to install and every fitting stays visible for inspection. Underground tanks keep the yard clear and need cathodic protection, an excavation and a professional installer. Our guide to underground versus above ground propane tanks compares the two.
- Does the 120 gallon propane tank come with propane in it?
- No. Every tank we sell ships empty. After a licensed installer sets it to NFPA 58 and your local code, a licensed propane supplier of your choice makes the first fill.
- How is a 120 gallon propane tank delivered, and what does delivery cost?
- Tanks ship by freight from the nearest of our three US yards to any address in the 48 contiguous states, with liftgate service on residential deliveries. Delivery is a flat $350.00, shown and charged at checkout. Delivery is curbside; moving and setting the tank is part of installation.
- Can you install a 120 gallon propane tank?
- Most of these tanks offer professional installation as a fixed-price add-on at checkout, carried out by a licensed local installer we arrange. The add-on price for each tank is in the table on this page. Permits and local authority fees are not included.