If you’re shopping for a 350-gallon propane tank or larger, you want options that balance capacity, safety features, and ease of installation. This guide highlights five Flame King and similar-size tanks, suitable for RVs, vans, campers, and home heating setups. Each entry includes who it’s best for, why it’s chosen, and a practical caution. The buyer types covered include full-time RV travelers, weekend campers, small home heating users, and vehicle-based setups that need reliable propane supply.
| Product | Type | Capacity | Best For |
|---|---|---|---|
| Flame King YSN293 29.3 Gallon Horizontal | Horizontal ASME Cylinder | 29.3 gal | RVs, vans, trailers needing compact under-mount tanks |
| Flame King YSN420ASME 420LB (120 Gallon) | Vertical ASME Tank | 120 gal | Stationary setups needing pre-installed gauges |
| Flame King YSN122 12.2 Gallon Horizontal | Horizontal ASME Cylinder | 12.2 gal | Small spaces, secondary or auxiliary propane supply |
| Flame King YSN293 29.3 Gallon Horizontal (Different model) | Horizontal ASME Cylinder | 29.3 gal | Similar use as larger RV setups needing flexibility |
| Flame King 100LB 23 Gal Steel Tank | Steel Tank with POL Valve | 23 gal | Home or grill-focused systems with smaller capacity needs |
Flame King YSN293 29.3 Gallon Horizontal Tank
Purpose-built for vans, RVs, campers, and trailers, this ASME-certified horizontal propane cylinder offers a compact profile with a 29.3-gallon capacity. It includes high-quality valves and a level gauge to monitor propane. Best for travelers who need steady supply without a large footprint.
Best for: RVs and vans that require under-mount, space-efficient propane storage. The integrated level gauge helps avoid mid-trip shortages.
Caution: Ensure mounting hardware and space clearance meet your vehicle’s specifications to prevent interference with doors or cabinets. Data indicates a 98-pound gross weight, which affects mounting considerations.
Flame King YSN420ASME 420LB (120 Gallon) Vertical Tank
This vertical ASME tank ships empty and pre-purged, ready for filling with propane. It comes pre-installed with a propane float gauge and provides standard high-quality valves for reliable operation. Best for stationary installations or home-heating setups that benefit from a larger, vertical tank configuration.
Best for: Budgets and spaces where a larger, easy-to-read gas gauge and ready-for-filling status matters. The “Remote Ready Dial” option can be added later for advanced readings.
Caution: The unit ships empty, so initial setup requires proper procedures and compliance with local codes before filling.
Flame King YSN122 12.2 Gallon Horizontal Tank
ASME-certified and designed for vans, RVs, campers, and trailers, this compact 12.2-gallon horizontal tank features premium valves and an integrated level gauge. Best for smaller vehicles or as a secondary tank to extend propane availability on trips.
Best for: Small-space vehicular applications where a lightweight, reliable propane source is needed. It’s a good fit when you want a second tank for extended trips without adding bulk.
Caution: This unit is smaller in capacity; plan for fuel logistics to avoid running out during long outings.
Flame King YSN293 29.3 Gallon Horizontal Tank (Alternate)
This entry mirrors the 29.3-gallon horizontal model with similar features: ASME certification, durable steel construction, and high-quality valves. It’s intended for flexible mounting on RVs, vans, and trailers that need dependable propane supply in a compact form.
Best for: Travelers needing a proven, compact main supply with straightforward installation. It pairs well with other onboard systems for a balanced propane strategy.
Caution: Verify vehicle clearance for the horizontal length to ensure door and storage access remain unobstructed.
Flame King 100LB (23 Gal) Steel Tank
This 23-gallon steel tank features a POL valve and a durable powder-coated finish. It is DOT-approved, X-ray and hydrostatic tested for safety. Best for home heating systems, fireplaces, dryers, and grills that require a larger, stationary propane source without excessive footprint.
Best for: Home or fixed-location heating and cooking setups where a robust, long-lasting propane reservoir is preferred. It’s an economical choice for steady, household-level supply.
Caution: Not ideal for mobile applications; ensure ventilation and storage comply with safety codes in your area.
Buying Guide: Key Considerations for 350-Gallon Propane Tank Buyers
- Capacity vs. space: Choose capacity compatible with your usage pattern and available installation space. Horizontal tanks save space on vehicles; vertical tanks offer easier gauge visibility.
- Mounting and placement: For RVs and vans, verify under-mount compatibility and clearance for doors, hatches, and ground clearance.
- Valves and gauges: Look for tanks with fill, relief, and service valves and an integrated level gauge for easy monitoring. Remote-read gauges can be added later if needed.
- Pre-purging and safety: Pre-purged units reduce risk of gas contamination; ensure proper venting and adherence to local codes during installation.
- Materials and finish: Powder-coated steel provides durability and weather resistance for stationary setups; RS-style hoses and fittings should match your propane system.
- Transport and handling: Heavier tanks require proper lifting, equipment, and vehicle capacity planning. Confirm weight and balance for mobile use.
- Regulatory compliance: Ensure your tank meets ASME or DOT standards and local safety regulations for your specific application.
Frequently Asked Questions
- What is the typical use for a 350-gallon propane tank? Answer: Most commonly used for RVs, trailers, and small home heating setups where a larger propane reserve is beneficial.
- Do these tanks come pre-purged? Answer: Some models ship empty and pre-purged or ready to fill; check the product description for your chosen tank.
- Can I install a propane tank myself? Answer: Installation should follow manufacturer instructions and local codes; professional installation is recommended for safety and compliance.
- Is a vertical or horizontal tank better? Answer: Horizontal tanks save space in vehicles; vertical tanks can offer easier gauge readability and larger capacities in a shorter footprint.
- What accessory options should I consider? Answer: Remote gauge options, additional regulators, and mounting hardware compatible with your vehicle or home system can improve usability.
- Are all these tanks ASME-certified? Answer: The Flame King models listed are ASME-certified, while listings may vary by model; always verify certification in the product details.