Flame King YSN-301 30 Pound Steel Propane Tank Cylinder - Refillable

In this review the Flame King YSN-301 30 pound steel propane tank is evaluated for RV owners, off-grid campers, and tradespeople who need a larger refillable tank. The bottom line: its biggest selling point is robust construction combined with required safety features, making it a practical refillable option when you want a heavier-capacity tank that connects like a standard cylinder. The tank ships empty and pre-purged, ready for filling, and the review focuses on ease of use, safety certification, and real customer feedback about condition and fillability.

Key Features

• Empty, ready for filling: The tank arrives pre-purged and vacuum ready so it can be professionally filled without the need for additional preparation.
• Overfill prevention device: The included OPD valve prevents overfilling and aligns with state refill requirements so most filling stations will accept it.
• Certified safety testing: X-ray and hydrostatic testing plus DOT and Transport Canada compliance give confidence for safe transport in both the US and Canada.
• Durable construction: Built from high-grade welded steel and powder coated to resist rust, the cylinder is intended for repeated use and outdoor conditions.
• Standard connection: The valve uses a standard-size connection, so it mates with RVs, trailers, attachable heaters and common propane accessories.
• Industry pedigree: Made by Flame King, a brand focused on refillable propane solutions across multiple sizes, which supports parts and refill compatibility.

Who It's For

The YSN-301 suits RV owners, contractors, and campers who need a larger, refillable 30 lb cylinder that installs like smaller tanks and offers DOT/TC certification for safe road transport. It is a good fit when you need seven gallons of propane capacity and prefer a refillable steel tank over disposable canisters.

Those who should look elsewhere include buyers who cannot easily access a refill station that accepts OPD-equipped tanks or anyone who needs a prefilled option on arrival; this model is shipped empty. Also, if corrosion resistance beyond a powder coat is critical in salty marine environments, a different finish or material might be preferable.

Pros & Cons

Pros

• Solid, welded steel construction and powder coat finish offer durable, long-term use.
• Required OPD valve reduces overfill risk and ensures broader refill acceptance.
• DOT and Transport Canada testing provides confidence for legal transport across borders.
• Standard valve connection makes it compatible with common RV and accessory fittings.

Cons

• Some customers report inconsistent condition on arrival, so inspection before first fill is recommended.
• Fillability experiences vary among users, indicating some may need to try multiple fill stations if initial attempts fail.

Specifications

Brand	Flame King
Model	YSN-301
Capacity	30 pound (approx. 7 gallon) cylinder
Condition on arrival	Empty and pre-purged, ready for filling
Valve	Type 1 OPD overfill prevention device, standard connection
Certifications	DOT and Transport Canada; X-ray and hydrostatic tested
Construction	High-grade welded steel with powder coat finish

Our Verdict

The Flame King YSN-301 is a practical choice for users who want a refillable 30 lb propane cylinder with required safety features and durable steel construction. It represents good value when you need a larger capacity that connects like standard tanks, but inspect on arrival and confirm local fill station acceptance to avoid fillability issues.

Frequently Asked Questions

Is the tank shipped full?
The tank ships empty and pre-purged, so you must take it to a certified refill station for charging.

Will my local refill station accept the valve?
The included OPD valve is the required style in most states and is accepted at most refill locations, but it is wise to confirm with your station beforehand.

Is the tank safe for travel between the US and Canada?
Yes, it is DOT and Transport Canada certified and has undergone X-ray and hydrostatic testing for safe transport in both countries.