Egan, I'm seeing some things with your airlines that I'm wondering about after learning some things on this website. 1st, I notice your filter and regulator are right off the tank with no dripleg. As I understand it, if the you're using the compressor for a while, the hot air created by the compressor will end up bypassing the filter you have there and you'll end up with moisture in the lines anyway. 2nd, I don't see any driplegs at the ends of your drops. Also, I see the guage and the knob below it and was trying to figure out if this was some sort of regulator and if so, why isn't the knob before the guage?
I like the poly and conduit, but I don't think I could use a 3/8" tube. I've got a 1/2" ball valve on a ****** from the 1/2" outlet on the 2 stage, 175 psi compressor going to a 3/4" adapter to a 36" long 3/4" hydraulic hose from TSC to a 3/4" copper tee with a 6" drip leg adapted down to a 1/2" ball valve with a hose bibb adapter on the other side and a piece of garden hose to direct the blow off. The 3/4" copper goes up to the ceiling and tees, one leg going towards the roll up garage door and the other across and down the other side of my cubby at the front of the garage to another tee with a drip leg that the 1/2" ball valve discharges into my laundry sink. After the tee there will be a point of use (POU) filter and regulator and there will be 3 or 4 drops along my bench. The other leg on the ceiling will slope towards the garage door opening then go down the wall with a cross or 2 tees with aother drip leg. One side of the cross will go to a POU filter and regulator and I may add a coalescing filter after the regulator (this side is for painting), the other side of the cross will have a filter and coalescing filter, but no regulator, it'll see 175 psi. This side will be hooked up to a bead blast cabinet or a blasting pressure pot, they typically have their own regulators so I want them to get whatever air requirements they need. I'm hoping the greater surface area of the copper, plus going from 1/2" to 3/4" will help the moisture to drop out of the air quicker as well as allow the air to cool more quickly.