Does anyone recognize this? Is it a patch? It was mounted on the bottom of a 275 gallon steel fuel oil tank in a basement I inspected today. Also, there was a tub under this on the basement floor with about 1 gallon of fuel oil in it. Also, there was a drop of oil on the bottom of this item. The word “Stewart” was visible on the tag but I couldn’t read any of the rest of the tag.
Thanks for any comments.