"DaveC" wrote in message
news.net...

This sounds like a very creative idea, but I'm having difficulty picturing
what your set-up is. (A compressor with a "float assembly"? Water actually
accumulates enough to require a float?)

It was a propane tank in real life. It had a float-actuated gauge. The
gauge port was BIG, so it was a nice place to combine some functions.


I've got 2 ports on this tank: input (small boss fitted with 1/4 copper
tube
connecting to compressor output), and output (large (2-inch?) threaded
boss
with 1/4ntp threaded adapter (plug) connecting to 1/4 pipe with tees for
gauge and quick disconnect hose fitting).

Hmm... I could adapt the input to also act as output, and put the dip-tube
drain on the large boss.

How, exactly, is a dip-tube drain constructed? How do you fit a tube
internally and connect that to the backside of a 1/4ntp (or such) output?

The manifold had two holes straight through into the top of the tank: one
for the relief valve and one for the new pressure gauge. It had a THIRD
hole that had a petcock on the outside, and a copper compression fitting on
the inside to accept the dip tube.

LLoyd