A picture is worth a thousand hard to visualize (hard to understand) words.

The TP Tools & Equipment diagram at the link in my earlier post has well thought-out features to improve condensation and water-separation.

In addition to the use of metal piping:

Each "take-off" for an outlet from the main line uses:
- a riser,
- a T-fitting off the down-pipe (with "bleeder" at the bottom), and
- that"take-off" from the T in the down-pipe uses another riser before putting any moisture/oil-removing apparatus just before the terminal regulator/gauge.

This accomplishes the "sediment pipe" at each "air drop", described above.