So disappointed.   We have owned two propane firepits in the past, so we are aware of how long a propane tank lasts.   This unit burned one entire tank within three hours the first time.   Thinking it may have been the new tank we purchased a new one.  Again this time less than three hours usage the tank was empty.   I turned off the tank at its source after use yet still there is a problem.    When we turn it on it goes out after a minute or so at least five times before it stays lit.    I have submitted a complaint believing it is a manufacturing problem.   After the first empty tank I checked and tightened all the connections from the manufacturer still the problem continued.   I will let you know if they offer to replace or correct the issue.