"Joe AutoDrill" fired this volley in
:

Okay... I have to ask... What's with the stainless steel exhaust
flex pipe and natural gas-type couplings going to the reservoir tank?


That's not exhaust pipe, it's high pressure flex hose, wire-reinforced.

One wants not to "hard couple" something that vibrates to hard piping.

That's the proper way to do it.

LLoyd