Propane Tanks 101: Sizing, Safety, and Setup for Outdoor Fire Pits

Whether you’re a contractor installing a fire pit for a client, a designer specifying outdoor fire features, or a homeowner planning your dream patio—understanding propane tanks is essential for safe and efficient fire pit performance. In this guide, we’ll break down the best propane tank sizes, connection setups, and important safety tips when using propane with outdoor fire pits.

5 lb Propane Tank LP Cylinder (Portable)

• Ultra-portable; ideal for tabletop fire pits or short-duration use
• Holds ~110,000 BTUs
• Burn time: ~1.5–2 hours on a 65,000 BTU burner
• Great for campers, small patios, and travel setups

10 lb Propane Tank LP Cylinder

• Compact and portable, slightly longer run time than 5 lb
• Holds ~220,000 BTUs
• Burn time: ~3–4 hours on mid-range burners
• A favorite for small residential pits or occasional use

11 lb Propane Tank Cylinder

• Similar to the 10 lb tank, often used interchangeably
• Ideal for smaller fire features where space is limited
• Burn time: ~3.5–4.5 hours depending on output

20 lb Propane Tank LP Cylinder

• Most common size for residential use
• Holds ~430,000 BTUs
• Burn time: ~6–10 hours on a 65,000 BTU fire pit
• Compatible with most fire pit burners and fire tables

30 lb Propane Tank LP Cylinder

• Higher capacity for longer use without refilling
• Holds ~640,000 BTUs
• Burn time: ~9–12 hours
• Suitable for larger fire pits or moderate commercial use

40 lb Propane Tank LP Cylinder

• Extended run time; ideal for large pits or high-traffic venues
• Holds ~860,000 BTUs
• Burn time: ~13–15 hours
• Often used in hospitality or event settings where frequent refills are inconvenient

🔌 Propane Tank Setup & Connection Tips

To properly connect a propane tank to a fire pit, here’s what’s needed:

Hose & Regulator Kit: Connects the tank to the fire pit. Ensure the regulator matches your burner’s BTU rating.

Air Mixer Valve (for propane setups): Ensures clean burning and prevents black soot.

Secure Connections: Always check for gas leaks using a soap-water test after installation.

Ventilation: If your fire pit has a tank enclosure, it must have proper ventilation per safety codes.

Quick Disconnect (Optional): Useful for commercial installations to quickly swap tanks.

➡️ Important: Do NOT use Fire Glass with Propane unless it is 3/4" or larger.

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🔒 Propane Tank Safety for Fire Pits

Safety is crucial when using propane. Here are key precautions:
Keep at least 5 feet away from the flame or ignition source.
Check for rust, dents, or leaks regularly.
Use UL-listed hoses and parts only.

In cold climates, monitor flame performance, as low temperatures can reduce propane pressure.

➡️ Bonus Tip: Install a manual shut-off valve or a key valve to easily turn off gas during maintenance or in emergencies.

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🛠️ Final Thoughts: Choosing the Right Propane Setup

For short-term use or portability, the 5 lb and 10 lb tanks are perfect. For residential fire pits, 20–30 lb tanks offer the best balance of size and run time. For commercial-grade installations, a 40 lb tank provides long-lasting fuel with fewer interruptions.

Need help choosing? Explore our collections of Propane Tanks and Accessories for your Fire Pits to find the perfect match for your setup.