I had a twin tank construction compressor (bought used for 10 % of new cost that had a small pin hole leak). I brazed it, then filled it with water and ran it up to to 180 pounds for a presure test. normal shut off is 125#. We always drained the tank every day. It got a lot of rough treatment on construction sites and finally got a couple more leaks. Last time i got my body pick hammer and started picking the bottom and easily made about a dozen holes.. THE BEST thing is to buy a new tank and have peace of mind now. and drain the moistere every day of use. .