[teach350]

My propane gas logs sometimes suddenly cut off and right away come back on with a sort of loud pop or puff sound. Could it be there is air some how in the line or what? The tank was recently refilled. It has been doing this occasionaly for about a week or two.
Thanks,
Jesse

[labman]

I think even the large tanks are set up to pipe vapor out of the head space. Any air in the tank would quickly mix with the propane vapor and pass through without a problem. I guess it would be possible for some water to have somehow gotten trapped in a low spot in the line. Not sure how you would fix that without removing the line and flushing it with little alcohol or acetone.