After running hardline all over my garage, I found that I only really use one of the outlets that I installed - probably because it's the most convenient and also has all the air driers and filters. I have 2 other connections that are straight off the tank and another that has a regulator but no filter or drier. I used 1/2" iron pipe for my lines. I just don't trust PVC pipe, regardless of thickness, since it gets brittle when cold - and it does get cold in the northeast. I'd rather not have PVC shrapnel flying all over my garage.
As far as Harbor Frieght stuff, I have a dissicant drier that I got from there that works pretty good. It's basically a 2 foot piece of iron pipe filled with dessicant beads. I haven't seen it at any of the stores recently and it's not on the website anymore, so maybe it's discontinued now. I haven't tried any of their other filters. To get the driest air possible (without sinking a large amount of money in a refrigerated air dryer), I am using the Harbor Frieght drier that holds 2 lbs of silica beads, followed by a Devilbiss QC3 filter/drier to catch any remaining water or oil. I've been pleased so far. I use the Harbor Freight drier as a pre-filter/drier since silica beads are significantly cheaper than the filter cartridge that the Devilbiss filter uses. Luckily, at this time of year, the humidity drops way off so I don't saturate the silica so quickly. It really sucks in the summer when the humidity is 100000% all the time.
I only run the air through the Devilbiss filter when I use my spray guns. For eveything else, the other drier is good enough - I just want to make extra sure that no water makes it to the spray gun.
'66 Emberglo Coupe
5.0 EFI conversion
TwEECer EFI tuning
Rod & Custom Motorsports IFS
TCP subframe connectors
Vintage Air Heat & AC
'99 Black Cobra - Daily driver
Last edited by Greg'66 5.0; 11-09-2012 at 12:29 PM.