**Close the propane tank valve after each use.** Relying on the fireplace control alone leaves the hose, regulator and connections supplied with gas. Manufacturers recommend shutting off the fuel supply when a portable gas appliance is idle. [Weber safety guidance](https://www.weber.com/CA/en/blog/burning-questions/turn-it-off-turning-off-the-fuel-source/weber-30503.html)

An open tank valve does **not automatically cause a leak**: an intact system with its burner valve closed should stop gas flow. The risk is that a damaged hose, loose connection or faulty valve can release gas continuously while the tank remains open. Propane is heavier than air and can collect near the ground or inside a poorly ventilated enclosure. A spark or flame can then cause a fire or explosion. Closing the tank valve cuts off the supply to those downstream components. [Propane Education & Research Council safety guide](https://propane.com/safety/safety-guide-for-propane-users/)

For your setup:

- **Check the manual’s tank-access instructions.** If you must lift the whole fireplace to reach the valve, ask the manufacturer how it is intended to be accessed. Avoid lifting or tilting a burning or hot appliance.
- Keep the tank compartment’s ventilation openings clear, and use the specified tank position.
- Use only the firestones approved for your model, in the amount and arrangement its manual specifies. Rock placement can affect burner operation. [Example fire-pit installation instructions](https://pdf.lowes.com/productdocuments/fff48d9f-a712-495c-9d8b-9b8f2ee5324e/48746326.pdf)

If you smell gas or hear hissing, **do not light the fireplace**. Move everyone away, avoid flames and electrical switches, and call the fire department or propane supplier from a safe location. [PERC emergency guidance](https://propane.com/safety/safety-guide-for-propane-users/)

What brand and model did you buy? That would let me check the intended valve access and shutdown procedure.