Slammed at work so I can't do the plumbing on my storage addition. I was always planning on black iron because I don't trust my soldering skills, but now I don't have time to do the work. That means hiring out the plumbing modifications. So copper is way more expensive than black iron, but way less in terms of install time. At $100-125/hr for the plumber, is it a wash and are there benefits of going copper? Running the lines will be somewhat complex since I must run up and over a door frame to get to the tanks with lots of elbows, joints, unions, etc. I've told the plumber all American fittings (no Chinese junk) in black iron. Now I'm thinking it may actually be cheaper in copper because of the labor savings. I intend to keep everything 1 1/2" dia just to keep head losses low in the boiler barn. The Laddomat has 1 1/4" fittings so I guess boiler to storage could be 1 1/4". Thots? Way behind schedule, but gotta balance priorities.