On Tue, 13 Jun 2017 08:46:48 -0500, Unquestionably Confused
wrote:


Not sure to whom you're directing the question but the OP has stated
that it's not a bladder tank, it's a galvanized tank, it has no Schrader
valve on top.

That works for me since I've never seen a bladder tank without a
Schrader valve on top, nor have I seen one that is galvanized. Plus
they typically have a very prominent label indicating they are bladder
tanks, charging instructions, etc.

Those old galvanized tanks are huge compared top a bladder tank (the
point of the bladder).
I would chuck the big tank and buy a bladder tank.