On Feb 14, 6:51*pm, wrote:
I'm trying to seal an open galvanized drain line (1930s era) that's
embedded in my masonry walls. The line is about 6 inches in the wall,
and rather difficult to get to.

There aren't any threads left (all broken or rusted off) to screw a
cap in.

What do I do at this point? I tried a test-plug and I still get some
leakage around the edges.

Any advice?

-Matt

I assume you jusst want to seal it off.

If the line is not used anymore and there is very little pressure, you
could try a can of expanding foam. Shove a plug of wadded up paper in
about 6" and fill the rest with foam. Clean the interior of the pipe
as much as possible before doing it.

Harry K