Originally Posted by
2010ontest
This is possible (with some modification) to change the weight of the 10lbs regulator to get one of 12 lbs... the manometer stay on your pressure canner anyway. Some people add piece of washer on the regulator to increase the weight to get 12 lbs (or what they need), some other add bit of metal (solder) to get it.
At least when you have a regulator like that, you know it right a way (by sound) if the pressure go under 10 (or 12 if you have modified the regulator)
Where I am, we are suppose to can at 11lbs... The Mirro pressure canner didn't have a manometer only the 3 parts regulator (5/10/15) but even at 10 lbs, temperature inside the pressure canner go to 114-115 C (I know, I have thermocouple at home to look at this) and usually time treatment recommand by Bernardin, ball or usda are more than enough to be safe with the 10lbs in my area.