On Tue, 9 Feb 2021 06:18:47 -0500, "Jim Wilkins"
wrote:

"Gerry" wrote in message ...

In order to draw compressed air from the upper level of my inverted
propane cylinder storage tank; I bazed a half coupling into the inner
end of a reducing bushing (I don't have a welder) and inserted the
smaller pipe through a 3/4" "T" and nipple in the threaded boss. The
branch of the "T" serves as inlet and drain.

--------------------------

Something like this, in effect?
https://www.zoro.com/nibco-2-x-34-x-...x2/i/G1806664/
Somewhat similar, but in iron fittings and with the smaller pipe
extending through the nipple into the tank.