420 lbs (120 Gallon) ASME Propane Tank
$1,095.00
Residential Propane Tanks
420 lbs (120 Gallon) Propane D.O.T. Tank
DOT CertifiedShips Empty
This tank ships empty. You can add a first fill of propane below. If you do, the tank is filled only after it has been installed and has passed its leak check - a licensed local propane supplier we arrange makes the fill, usually a few days to two weeks after installation. How refueling works
$1,225.00
Factory-direct pricing. Delivery from $350.00, priced by ZIP from our nearest yard at checkout.
A 120 gallon (420 lb) DOT certified propane cylinder. Vertical, portable steel tank with lid, vacuum pre-purged, with fill valve, gauge and safety valves. Regulator not included.
A licensed local installer we arrange sets the tank on a prepared pad, fits the regulator and gas line, and leak-tests every joint before handover. Save 5% on the tank and installation together.
96 gallons is 80% of this tank's 120-gallon capacity, the legal fill limit, at $2.67 per gallon. The tank still ships empty: a licensed local propane supplier fills it after it is installed and passes its leak check - usually a few days to two weeks after installation. The pre-fill leak check and account setup are free when you order the fill with your tank. Save 5% on the tank and fill together, or 10% with professional installation as well. How refueling works
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Ships from a yard near you
We dispatch from nine yards across the US, so your order leaves from the closest one, not from the other side of the country.
- Bristol, CTConnecticut, Massachusetts and New England
- Bethel, CTWestern Connecticut, New York and the Hudson Valley
- Cape May Court House, NJNew Jersey and Delaware
- Peach Bottom, PAPennsylvania, Maryland and the Mid-Atlantic
- Mentor, OHOhio, western Pennsylvania and West Virginia
- Clarkston, MIMichigan, Indiana and the Great Lakes
- Springfield, ILIllinois, Wisconsin and the upper Midwest
- Kearney, MOCentral states and the Plains
- Von Ormy, TXTexas, the South and the Southwest
Estimated delivery: 7-10 business days. Shipping details
Secure card payment at checkout. You pay at checkout, so nothing is left outstanding. Your order is confirmed and moves into processing the moment the payment goes through. How ordering works · Questions? (210) 570-4603
| SKU | PT4L-420LBS120GALLONPRO-JJNK2 |
|---|---|
| Supplied | Empty - no propane or fuel included |
| Capacity | 120 gallons |
| Weight rating | 420 lb |
| Condition | New |
| Certification | DOT |
| Shipping | LTL freight - from $350.00, priced by ZIP |
Valves & fittings included
- POL service valve
- The standard cylinder outlet your regulator or pigtail connects to.
- Fill valve
- Filler valve for refilling in place by your propane supplier.
- Pressure relief valve
- Required safety device, set to vent before the vessel is over-pressured.
- Gauge
- Level gauge so the cylinder can be read without weighing it.
Valves are factory-fitted to the vessel. The regulator, gas line and the propane itself are not included - a licensed installer connects the tank and a licensed supplier makes the first fill.
Home delivery - shipped by LTL freight to your address
- Liftgate service is included on residential deliveries.
- Delivery is curbside, by appointment booked on the number on your order.
- Delivery is one flat rate, shown and charged at checkout - nothing is invoiced afterwards.
- Ships from the nearest of our nine US yards - in CT, NJ, PA, OH, MI, IL, MO and TX.
- Delivered anywhere in the 48 contiguous states.
Full terms on shipping & delivery and installation.
About the 420 lbs (120 Gallon) Propane D.O.T. Tank
The 420 lb (120 gallon) D.O.T. propane tank is a new, vertical steel cylinder for owners who need far more propane on site than a row of grill bottles can hold but have little room for a large horizontal tank. It stands upright on a small footprint, comes fitted with a fill valve, a gauge and the standard safety valves, and has a high-density polyethylene lid that protects the valves and will not rust or dent.
What it suits
A cylinder this size is a common pick for one heavy appliance or a handful of lighter ones: a range, a water heater, a fireplace insert, a small generator or a heater for a shop or garage. Because it is tall rather than long, it takes up very little yard space beside the building it serves. Where exactly it stands is your installer's call, since distances from doors, windows and ignition sources are set by the national propane code and your local authority. If you are weighing it against other capacities, the propane tank size chart lays them out side by side.
Key specifications
- Capacity: 120 gallons, rated as a 420 lb cylinder
- Build: vertical steel cylinder made to D.O.T. specifications
- Lid: high-density polyethylene, rust-proof and dent-proof
- Valving: fill valve, gauge and standard safety valves; regulator not supplied
- Vacuum pre-purged at the factory
- Condition: new, shipped empty
D.O.T. or ASME?
The two labels describe the standard a vessel was built and tested to. A D.O.T. cylinder is built to be transportable and carries a requalification date that has to be honored before it is refilled once that date passes. An ASME tank is designed for stationary service and is filled where it sits. At this size most owners leave either type in one place and have it filled on site. If you would rather have the stationary build, look at the 420 lb ASME version.
Common questions
What does vacuum pre-purged mean for me? Air and moisture have already been drawn out of the cylinder, so your supplier can skip the purging step before the first fill, along with the cost of it.
Can installation be added? Yes. Professional installation is offered as an $850 add-on; otherwise a licensed installer of your choosing connects the tank and supplies the regulator.
Does it arrive with propane in it? No. It ships empty, and your propane supplier makes the first fill.
