Flame King Propane Tank (20 lb, Steel, DOT/ASME Compliant)

The Flame King 20 lb propane tank is a solid, no-frills choice for RVers and campers who need a reliable fuel source for grills, stoves, and portable heaters.

4.4

HitchHaven score4.4 out of 5 · our editorial rating

20 lb capacity steel propane cylinder
OPD (Overfill Prevention Device) valve for safety
Durable powder-coated exterior finish
DOT-certified for nationwide refill and exchange
Compatible with RV grills, camp stoves, and heaters
Built-in gauge-ready valve collar

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Overview Specs Pros & cons Full review Related

The verdict

The Flame King 20 lb propane tank is a solid, no-frills choice for RVers and campers who need a reliable fuel source for grills, stoves, and portable heaters. Its OPD valve and DOT certification make it easy to refill or exchange almost anywhere, and the steel build holds up well to travel abuse. It's not the lightest option on the market, but its durability and affordability make it a dependable staple for any camper's gear closet.

Spec plate

Capacity: 20 lb (4.7 gal)
Material: Powder-coated steel
Valve Type: OPD (Overfill Prevention Device)
Certification: DOT/ASME compliant
Empty Weight: approx. 18 lb

Pros & cons

What we like

Widely accepted at exchange stations and refill depots
Rust-resistant coating holds up in outdoor storage
Sturdy steel construction withstands rough handling
Affordable price compared to name-brand tanks
Easy-to-read fill markings on collar

What to watch

Tank arrives empty, requires separate fill/exchange
Powder coat can chip if dropped on concrete
Slightly heavier than aluminum alternatives
No carrying handle on base model

Full review

The Flame King propane tank is a purpose-built fuel storage solution designed for RV owners, campers, and outdoor enthusiasts who need a dependable source of propane on the road or at the campsite. Constructed from heavy-gauge steel, these tanks are built to withstand the bumps, vibrations, and temperature swings that come with travel, while still meeting strict DOT safety standards for transport and storage. Available in a range of sizes, including 20, 30, and 40-pound options, the tank is sized to fit into the propane compartments of most travel trailers and motorhomes, making it a practical upgrade or replacement for factory-installed cylinders that have reached the end of their service life.

Beyond its rugged build, the Flame King propane tank features a durable powder-coated finish that resists rust, chipping, and corrosion, which is especially important for RVers who face exposure to rain, road salt, and fluctuating humidity during extended trips. Each tank comes equipped with a reliable overfill protection device (OPD) valve, a safety feature that prevents overfilling and ensures compatibility with modern refill stations across the country. The valve also includes a secure connection point that pairs easily with regulators, hoses, and quick-connect fittings commonly used for RV stoves, furnaces, water heaters, and portable grills, giving campers a seamless way to power multiple appliances from a single tank.

Lightweight handling features, such as a sturdy carrying handle and a stable base, make the Flame King tank easy to transport, store upright in an RV’s propane bay, or set beside an outdoor cooking station without tipping. Its long-lasting construction and consistent gas flow make it a trusted choice for weekend getaways, extended cross-country trips, and off-grid boondocking where a steady propane supply is essential for cooking, heating, and running appliances. Whether used as a primary tank or a backup for longer journeys, the Flame King propane tank offers RV and camper owners a dependable, code-compliant fuel source built specifically for life on the road.

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