I have mine installed at the tank. That is where the BF told me to put it. But someone else may have different thoughts. I think when you are workin on a smaller tank like the one pounders that a lot of people use it isn't an issue, but when you have 25 pounds of propane sitting next to you and a fairly large flame that is sometimes unpredictable, I would say to be on the safe side and put one on. IMHO. 25 pounds of propane+flashback= big boom if something goes wrong.