Thanks for all the advice. As if I didn't need more options
I hadn't thought about draining the water under pressure. I started adding valves before each drop so I can shut them off when not in use and not to make a huge mess. I'm pretty accident prone.
If I keep the above setup I will be adding another valve before or after the regulator for draining purposes.
I've never dealt with copper before so I didn't consider that as an option.
I'm all for rotating everything 90 degrees but the layout with the regulator and accessibility concerns me. The compressor is mounted in the corner of my garage between the overhead door and man door. My electrical panel, light switch, and (2) outlets are on one wall and the other is only 56" wide. If I go vertical the location of the regulator and drains are easy to get to. Horizontal I'm afraid the regulator would either be 6-7' in the air or behind the compressor. I'm mounting this to 1/2" OSB on a insulated wood-studded wall.
I'm still thinking. Need to finish so I can finally start tearing the truck apart