LMSC Got the SB drain pipe fitting to try for the service boiler.
Please look at the nut pointed by the arrow on the Vac Brk. Is this the one to remove — to lift the service boiler please ? There is some clearance.
I do not think thar nut can be removed. It is probably tightened on both sides.
What’s on the left underneath fitting L, knowing what’s there will determine whether you need to undo the fitting at all
The plugs on the bottom of the boiler will be sealed with sealant and you need a hex head to undo them.
Some plugs may be ¼ inch, some may be 1/8th inch thread (don’t think they are metric….I don’t know which is which, and you might want to check with ACS.
What size thread is your drain valve?
As I did warn, people are on their own with this, I don’t have a production machine and can’t really help much.