Freeze Plugs

["Brian St. Jacques" <brian@varatouch.com>]

I have seen a few messages going around about freeze plugs lately. I was
wondering if anyone had tried the rubber plug type. It is a big rubber plug
with a big washer on one side with a stud poking through. As you tighten a
nut on the stud, it flares out the sides of the rubber plug to hold it in
the hole. Seems to me that they would last a long time and there would be no
material issues to worry about.