John Yates
Carnivorous Plant Addict
the trouble with putting up you auctoclave /cooker pot up to 20 psi is that the vessels your using have to be able to handle it , if you dont loosen your lids when stacking in , at 20 psi you could blow up your jars , even de perusing is critical too , allowing min of 9 min at slow release is critical at 15 psi at 20 pis , its extremely critical as jars can explode or implode .if your going to go to 20 psi best you do some very good calculation on your chosen containers . i run my aucto-clave at 17 to 18 psi , with glass jars they do well , softer autoclave plastic dont do so well ,just be aware