Karl wrote:

I'm in the process of buying a home with oil fueled heat and hot water
and my question is about the storage tank. The tank appears in good
shape, but I noticed two "plugs" screwed into the bottom of the tank.
These plugs appear to consist of a screw, washer, and rubber gasket,
screwed directly into the bottom of the tank. Does anyone know the
purpose of these "plugs" and whether I should be concerned about their
existence? Thanks for any advice. -Karl

The tank is past end-of-life. Water in the fuel (condensate)
collects at the very bottom of the tank, where it rusts the steel
over years. If it has been repaired, you can be pretty sure
that the steel is paper thin.

Call the oil distributor out there and ask for a rough price
on replacement. Factor that into your buying decision.

Jim