Nationwide Delivery · ASME Certified Tanks
Home Propane Tanks For Sale Underground 500 Gallon
Underground  ·  ASME Certified  ·  Direct Burial

500 Gallon Underground Propane Tank For Sale

500 gallon underground propane tanks for sale at $4,000 new. ASME certified, factory coated for direct burial, ships to all 48 contiguous states. The 500 gallon in ground propane tank is the most common underground size for residential whole-home heating. Every 500 gallon underground propane tank for sale we supply meets ASME Section VIII and NFPA 58 standards.

500 Gal Underground
$4,000
Above Ground Option
$3,500
Ships To
All 48
500 gallon underground propane tank for sale ASME certified direct burial

500 Gallon Underground Propane Tanks For Sale — Order Direct

Complete the four steps to place your order
500 gallon underground propane tanks for sale new direct burial ASME certified Underground  ·  New
  • Factory applied burial coating prevents soil corrosion
  • ASME Section VIII pressure vessel certification
  • NFPA 58 compliant fittings and construction
  • 500 gallon in ground propane tank, new only
  • Ships by freight to all 48 contiguous states
  • Typical delivery 5 to 10 business days
  • We contact you within 2 hours to confirm
Place Your Order
Ships to all 48 states · 2-hour response
01 You
02 Address
03 Delivery
04 Review
Full Access
Limited Access
ASAP (5 to 10 business days)
2 to 4 weeks
Flexible, no rush
Wire Transfer
Bank to bank
Chime
Instant transfer
Apple Pay
Mobile payment
Credit Card
Unavailable at the moment
Order Summary
Tank
Condition
Tank Price
FreightQuoted after submission
Name
Delivery
Window
Payment
Total (excl. freight)
We will contact you within 2 hours to confirm your order and arrange delivery.
Order Received

We will be in touch within 2 hours during business hours to confirm your order and arrange delivery.

1We contact you within 2 hours to confirm your order details.
2We arrange freight delivery to your address and confirm the schedule.
3Your ASME certified tank ships and arrives in 5 to 10 business days.

500 Gallon Underground Propane Tank Specifications

Standard dimensions for direct burial installation
Tank Specifications
Capacity
500 gallons (400 gal working at 80%)
Length
Approx. 119 inches (9.9 ft)
Diameter
Approx. 41 inches
Empty Weight
Approx. 950 lbs
Operating Pressure
250 PSI
Certification
Standard
Coating
Factory burial coating for direct soil contact
Installation Requirements
Excavation Length
Approx. 11 feet
Excavation Width
Approx. 5 feet
Burial Depth
Min. 6 inches cover above tank top
Bedding
Clean sand or pea gravel recommended
Access
Dome access at grade for gauge and fill
Installer
Licensed propane contractor required
Setback
Per NFPA 58 and local requirements
Availability
New only. Underground tanks not available used.

Why Choose a 500 Gallon Underground Propane Tank?

The 500 gallon underground propane tank for sale is chosen when above ground installation is not practical or aesthetically acceptable. Underground tanks are invisible from the surface. The only visible component is the dome cover at grade level for gauge reading and filling access.

Underground tanks benefit from more stable temperatures. Soil insulates the tank from ambient temperature swings, which helps maintain consistent operating pressure year round. Above ground tanks in cold climates can experience pressure drops in winter that affect appliance performance. Underground tanks do not have this issue to the same degree.

The 500 gallon underground propane tank for sale ships to all 48 states by freight, delivered directly to your address. Propane tanks for sale 500 gallon underground are available for immediate order. See shipping details.

Invisible Installation
No visible tank above ground. Only the dome cover is at grade. Ideal for properties where aesthetics or HOA rules restrict above ground tanks.
Temperature Stability
Soil insulates the tank from ambient temperature extremes. More consistent pressure year round compared to above ground in cold climates.
Same Capacity
The 500 gallon underground propane tank holds the same working capacity as the above ground version. 400 gallons at the 80% fill rule.
$500 More Than Above Ground
Underground costs $4,000 vs $3,500 above ground. The $500 premium covers the factory burial coating applied before shipment.
500 Gal Underground Cost
$4,000
New 500 gallon underground propane tank for sale, factory burial coated, ASME certified. The cost is $500 more than above ground to account for the burial coating.
Full cost breakdown
500 Gal Above Ground Cost
$3,500
Same tank, no burial coating, saddle legs included. Easier to install and access for maintenance. Available new and used.
View above ground
Freight to Your Address
Varies
Freight is calculated from your ZIP code after order submission. We contact you within 2 hours to confirm. No upfront freight estimate required.
Shipping details

500 Gallon Underground Propane Tank Installation Overview

01
Hire a Licensed Contractor
Underground propane tank installation must be performed by a licensed propane contractor in your state. Contact your local propane supplier to arrange installation before ordering your tank.
02
Excavate and Prepare
Excavation of approximately 11 by 5 by 5 feet. Clean sand or pea gravel bedding placed at the base. Setback distances per NFPA 58 and local code must be observed before digging.
03
Lower and Set Tank
The 500 gallon underground propane tank for sale arrives by freight and is lowered into the excavation using equipment. A sacrificial anode may be added depending on local soil conditions. Tank is leveled and backfilled.
04
Connect and Inspect
Regulator, piping, and dome cover installed at grade. System inspected and tested before first fill. A permit may be required depending on your local jurisdiction.

500 Gallon Underground Propane Tank FAQ

Common questions before ordering
How much does a 500 gallon underground propane tank cost?

The 500 gallon underground propane tank for sale is priced at $4,000. This is $500 more than the above ground version at $3,500, because the 500 gallon underground propane tank for sale requires a factory applied burial coating to prevent corrosion from soil contact. Freight is calculated separately based on your delivery ZIP code and added to the invoice before any payment. Full 500 gallon propane tank cost breakdown.

Can you buy a used 500 gallon underground propane tank?

No. We do not sell used underground propane tanks. Underground tanks that have been buried accumulate soil contact on the exterior coating which makes it impossible to fully inspect the burial coating condition without professional testing. For this reason, underground propane tanks for sale are new only. Used propane tanks are available in above ground configurations only. View used 500 gallon above ground tanks from $2,200.

What is the difference between a 500 gallon in ground propane tank and an underground propane tank?

They are the same product described differently. A 500 gallon in ground propane tank, underground propane tank, and buried propane tank all refer to an ASME horizontal tank with a factory burial coating designed for direct soil contact. The tank is installed below grade with only the dome cover visible at the surface. The terms are used interchangeably by buyers and contractors.

How much does a 500 gallon propane tank weigh for underground installation?

The 500 gallon underground propane tank weighs approximately 950 lbs empty. A crane or excavator lift arm is required for lowering the tank into the excavation. It cannot be hand positioned. Your licensed propane contractor will arrange the appropriate equipment for installation.

Ready to Order a 500 Gallon Underground Tank?

We respond within 2 hours during business hours.