1/2" or 3/4" air system?

[Ryan Wilke]

In the TPTools diagram you want to go something like 8+ inches up before coming down. How do you handle the spacing off the wall since the pipes will have to cross each other coming back down from the 8 inch upwards section?

John,

Many folks will fasten the the main supply line to stand off blocks, such as 4" sections of 2x4s on the flat every 4' or so. This can be done with normal pipe clamps that nail down. The 1.5" thickness of 2x4 section will allow for air circulation around the pipe for cooling and if any soldering will need to be done in place, you'll be able to do a better job of soldering & be less apt to burn the wallboard too much. (Soldering Hint: If you use a heavy terry-cloth rag to wipe off any melted flux at your solder joints (while they're still hot) they won't corrode & turn green later.)

To allow for room for the moisture traps & valves on the vertical drop, you may want to double the stand off blocks (stack two = 3" from the wall) when fastening the drop legs (the main would be 1.5" off the wall whereas the vertical drop would be 3" off the wall, toward the center of the room). I'd use at least one fastening block near the top and one near the bottom of each vertical drop. You don't want to have "knuckle buster" valves at your drops.

Good Luck!
RWilke