Originally Posted by Nostrildamus
I can't see the weldless fittings, specifically the food grade O-rings holding up under that amount of heat
I use viton o rings to seal closures in rocket motor casings. They see 600-900 @ 1000psi repeatedly without failure.
In my commercial pressure washer (200*, 3000psi), black rubber orings last about a week, vitons last almost a month.
Either way, you should be FINE for low pressure water at 212*