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Flame King YSN420ASME 420LB (120 Gallon) ASME Vertical Steel Propane Tank, White

  • Based on 158 reviews
Condition: New
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Availability: In Stock.
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Arrives Sunday, Sep 6
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Style: ASME Certified


Features

  • PRE-INSTALLED with propane float gauge, can easily accommodate "Remote Ready Dial" for accurate gas level readings - sold separately
  • FITTED WITH HIGH QUALITY VALVES - 1.25-inch ACME Fill valve, Service Valve, and Relief valve
  • SHIPS EMPTY, pre-purged, vacuum sealed and ready for filling with propane
  • COMES WITH PLASTIC LID COVER for protection of the valves and gauge (Lid may be White or Black)
  • LONG LASTING RUST PROTECTION: High-grade welded steel is powder-coated for maximum protection
  • ASME CERTIFIED: These cylinders are manufactured to ASME specifications in facilities that have a Quality Management System certified to ISO 9002 requirements
  • DOES NOT NEED RE-CERTIFICATION: The advantage of ASME cylinders vs. DOT is that they DO NOT require recertification after 12 years from the Date of Manufacture.
  • ONE-YEAR WARRANTY: 1-year Manufacturer's Defect Warranty

Description

Flame King's ASME-certified 420LB (120 Gallon) vertical steel propane cylinder is the perfect solution for homes and businesses that are powered mostly by propane. Perfect for residential and commercial applications, providing fuel for space and water heating, cooking, generators and home backup power, and many more. ASME tanks are designed for stationary use and are typically installed underground or above ground (local propane installation regulations must be followed). The cylinder comes with a lid installed, arrives EMPTY, and vacuum purged ready for filling with propane, and is epoxy coated on the base of the tank for superior rust protection. The tank is preinstalled with a propane float gauge that can easily accommodate a "Remote Ready Dial" (sold separately) and is fitted with high-quality premium valves - 1.25-inch ACME Fill valve, Service Valve, and Relief valve. These propane cylinders are manufactured to ASME specifications in facilities that have a Quality Management System certified to ISO 9002 requirements. The advantage of ASME cylinders vs. DOT is that they do not require recertification after 12 years from the Date of Manufacture. Propane tank industry leaders providing quality, service and value, giving our customers the best experience with their propane tank equipment. You’ll find the quality of our service equals that of the propane tanks we deliver. Like all of our products, each propane tank and cylinder meet or exceeds industry regulations for quality and is manufactured in facilities that have won awards for proactive safety practices and regulations. Made of steel, Flame King offers a complete line of portable propane cylinders. Flame King’s steel portable propane cylinders come in various sizes ranging from 1 lb. to 420 lb. for recreational, commercial, industrial and home applications. These cylinders are manufactured to Department of Transportation (DOT) or Transport Canada (TC) specifications in facilities that have a Quality Management System certified to ISO 9002 requirements. Flame King's ASME certified tanks and cylinders are manufactured to ASME specifications in facilities that have a Quality Management System certified to ISO 9002 requirements. We understand that propane equipment can take a beating, therefore we produce our tanks with the sturdiest materials. We test our tanks under all conditions and in all possible scenarios, to ensure the highest standards of safety, guaranteed. At Flame King, we bring together technology and hardware, to provide better experiences for our tank users. We care about the environment and have therefore produced the Refillable 1LB propane tank - the first of its kind. 420LB ASME Tank 29.3 Gallon ASME Tank 12.2 Gallon ASME Tank 20.3 Gallon ASME Tank 5.9 Gallon ASME Tank 200LB ASME Tank 100LB ASME Tank

Brand: Flame King


Color: White


Material: Alloy Steel


Capacity: 120 gallons


Number of Packs: 1


Brand Name: Flame King


Number of Packs: 1


Number of Items: 1


UPC: 899003000496


Unit Count: 1 Count


Manufacturer: Flame King


Included Components: Propane Tank


Item Type Name: 420LB (120 Gallon) ASME Vertical Steel Propane Tank


Model Number: YSN420ASME


Part Number: YSN420ASME


Warranty Description: The manufacturer warrants Flame King Products (except paint and finish) to be free from defects in materials and workmanship for 1 year from the date of purchase.


Capacity: 120 gallons


Color: White


Material: Alloy Steel


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Sep 6

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

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Top Amazon Reviews


  • Great tank in perfect condition
Great experience and it was EXACTLY as described and as soon as it was delivered by the nicest guys we called the propane company and they came set it hooked it up and filled it! No more moving and filling the 100lb tanks ourselves now they fill it and we don’t have to lift a finger!
Reviewed in the United States on August 28, 2026 by Amazon Customer

  • good experience
pretty neat I can order a 120 gal propane tank and have it delivered to my house. The delivery guys where great and put the tank on the other side of the house where I built a pad with a hand truck. Price was much better than the local tank suppliers at least 300-400 dollars. I had purchased a gas fireplace so the gas line was run from tank (15 ) feet to fireplace, then propane delivered. Propane delivery guy needed to check things out since first delivery so he put some propane in tank and checked for leaks on tank and in house. No leaks, everything good and filled tank. Good experience ... show more
Reviewed in the United States on July 12, 2025 by rpw

  • More is Better
When Edison decides to cut power because of the wind, be prepared with darn near 100 gallons of propane to run your RV Generator. It took more time, patience and parts to get my Generator to run off this Bulk tank. The Propane Company added a 1st stage regulator to protect underground piping, I had to add an Independent 2nd stage and set to an 11” water column then I had to Tee in below my onboard RV Regulator setup. It runs like a Champ now. ... show more
Reviewed in the United States on November 6, 2025 by Ron Guay

  • As described
Great tank fast to my door shipping
Reviewed in the United States on July 14, 2026 by Amazon Customer

  • Seems well manufactured
Our propane delivery company was highly impressed.
Reviewed in the United States on June 2, 2026 by Jonnakb

  • Just right
just the right size for what I needed. It was easy to install and a great value.
Reviewed in the United States on February 23, 2026 by Richard

  • 120 Gallom Propane Tank
Tank was received from the shipper I damaged with the exception of slight marks in the paint coating. Fine all other respects. Tank appears well built to ASME specs. Good value for price paid.
Reviewed in the United States on January 7, 2026 by Martin H.

  • Great product
Bought this in October of 2023. Got it in December of 2023. After getting this some of the propane fill places asked how I was able to buy this take. I told them and they said nothing. I have found that because I own the tank they give me a better price. How I found out is that I heard my neighbors complain about the propane price they have to pay because they can’t shop for the best prices. Most of the time it’s $1 a gallon. Lately it’s been $2 a gallon or more. As far as rust. I found that it’s primer on it. You can get 2 rustoleum white spray cans at Home Depot for around $12 for a can. Looking at how much you save on propane cost why complain. If you are using it on your RV. You can hook it up to your RV propane regulator. You don’t need anything special. ... show more
Reviewed in the United States on September 14, 2024 by Amazon Customer

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