The Home Machinist!

don't bet on ability to get a correct o-ring material from anyone except Joe T and his couplings.

My recommendation is to just spend a few $$$ and get some good low-temp, hydrocarbon resistant O-rings of known heritage.

just the usual "mechanical engineer's caution:" Propane hoses can get quite cold if there is any expansion occurring in the line. Normally, this is not the case, but it is always good to stop and think about "will the O-ring used in this fitting handle really cold temperatures and not crack?"...resu...

squared!

living on a working 80 acre farm is all the 'exercise' I need.....but then I am not yet 70....

Use a paintball C02 tank

it is a bad idea.

now all you need is a can of white lead.....

I second Marty's comment about the FRA / ICC inspector.

fortunately there are enough stationary boiler inspectors around who can at least understand and describe principles of a boiler inspection.

if it works...what is there not to like?

the question begs to be asked...

how long did it take you to tear down the loco and have a 'clean' boiler sitting on the....whatever...?

photos are easy to come by..... not sure about putting drawings out on the forum...need someone's approval before I can do that look at the picture of Joe T's loco...there is a Nixon pump right there in front of the cab I have a photocopy of one of Ben's Original sketches from the 1970's It's a bit ...

I guess the real question to be asked here is:

Under what conditions is the metal going live?

THEN you can have a reasonable set of responses.

FWIW: consider the future and the drilling out a small SS screw is a LOT HARDER than drilling out one made of brass.