Thank you Hot Water, Dave, and John.
Hot Water - I have a roll of .062" solder I have from the late, great Radio Shack that looks to be perfect, thanks for the suggestion. I just removed the supply line from the cab to the check valve this morning. I have a precision scale casting for the spiral-wrapped steam lines from the cylinders to the heater, I'll use solder for the other pipes (to and from the pump, the condensate line, and from the heater to the check valve.
One thing I just noticed following the piping diagrams supplied by the NHRHTA - the feedwater heater only supplies the fireman's side check valve, while a traditional injector supplies the engineer's side. Was this a normal setup, to only preheat half the incoming water?
Pipe and check valve removed, feedwater heater pump and an ATS box will eventually go where the current air pump is.
Solder fitment in the check valve:
I finished painting the Delta trailing truck and reinstalled it:
Lastly for this past week, I 3D modeled a set of air pump shields and sent them off to be printed. I expect to have some revisions after this first pass, but images of the current model below.
~Chris
