| It's simple physics.  Water boils at 100C at STP  (standard temp  pressure 
(ie 1 atmosphere).
At higher altitudes there is less air pressure.  That why water boils  at a 
lower temp in Denver
If you're cooking and require 210 water you have to use a pressure cooker  in 
Denver.
 
In theory the Tiger will atart to boil at 100C 212F with no pressure  cap.  
Add about 3 F for
each lb.  This meens the 13 lb cap allows the boiling boil to go to  212F + 
39F or 259F.
and remember that's at sea level.  In Denver the boiling point I  believe is 
190F so your 13 lb
cap means the Tiger will boil at 190F + 39F or 229F.  In Chicago in  heavy 
stop and go, 240F
is easy to do.
 
For those at higher altitudes you can
(1) increase the atmospheric pressure
(2) move to a lower altitude
(3) keep the temp below boiling.
 
Seaming in Indpls
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