RayJay thanks for the info. I've been looking around for the filter rolls, and a few years ago, before I upgraded the compressor, I couldn't find much of anything on Motor Guard. Now, there seems to be lots of places to get both the units and filters (M30, 60 & 100).
As far as the automatic drain valves go, the IR one is nice but for my use, just a bit to pricey. I think the Combo D-Lux will do everything the IR one will do, but gives you much greater range in settings and doesn't rely on a air pilot port to activate.
The Expello apparently has been around for years, but I don't know just how efficient it would be venting for 1 second every 5 minutes 24/7. It was really made for use in trucks or busses with air compressors on board.
The Wilkerson X51 has a large following, but it does work strictly on a 10-20 psi pressure differential. It uses a piston-powered valve that automatically drains moisture each time your compressor cycles. It is activated by compressed air via a 1/8" NPT female pilot port (no electricity required). And connection to the pilot air port is strongly recommended.
So for my use which is not in a shop environment, and relatively light usage, I'm thinking that the Combo D-Lux for $122 is likely my best bet.
Bob, I think it is 1/2" pipe most of the way. I added the rubber 1/2" hose on the ceiling because it was relatively easy to do compared to plumbing 1/2" hard line, and again, for my use, even if the air flow is slightly restricted, it's not really a big deal. For using air tools, I have a separate setup that I attach to one of the 2 hard line taps or the end of the hose on the reel. It's composed of a regulator, a moisture trap and an oiler, all inline that connects between the air line and air tool. That way I don't have to worry about moisture getting past the M30. In practice, I've not found any moisture coming out, but do get the oil going to the air tool. I don't do any air gun painting, so that's a non-problem.
Out of curiosity, the brown filter element paper for the M30/60, I assume it's heavier than toilet paper, more like those brown paper towels you see in restrooms. Is that correct? Also, in the site RayJay posted for filters, this statement was made: Coalescing filter works best if elements are changed promptly, so keep extra on hand. Can be dried in the sun and reused. Is that true?
Just trying to learn all that I can so I don't make any really stupid misteaks. (Yeah, I did mispell that on purpose).
Thanks guys!