the safety plug is suposed to melt and relieve the pressure at about 265F - long before the pot bursts Celeste or Dave Anderson wrote: > > We use a Mirro pressure cooker/canner which has a weighted jiggler > with three different sized holes. The cause the weight to jiggle and > release steam at 5, 10, and 15 lbs. At our altitude, most everything > is cooked or canned at 15 lbs. There is also a blow-out plug which > will supposedly blow if the steam nozzle is blocked. The instructions > don't say at what pressure the blow-out plug explodes. > > Mirro also makes a single pressure cooker\canner. Pressure is 15 psi. > > > > > > I use these small pressure cookers/canners a lot. > > > The nice large ones have pressure gauges, but you have a vent jiggler > > > which serves the same purpose. > > > > Actually, it's not a loose jiggler, it's a non-removable weighted > > valve that pops up as soon as pressure begins to form and steam > > needs to vent. > > > > > > If you have the single position jiggler (one hole) it releases > > > steam at 10 PSI above your current sealevel pressure. > > > > It is a single hole type release mechanism. I was hoping to find > > some mention of the pressure at which it begins to vent in the > > instructions that came with the cooker, but there is non...and > > there is no list of specifications that might include such info. > > > > I guess I'd have to assume its 10 PSI, but that would only be an > > unverifiable guess. Think I'll stick to boiling water bath > > suitable preserving for now. > > > > > > -- > > Rich McCormack (Poway, CA) macknet@cts.com > > > > Who is Rich McCormack? Find out at... > > http://members.cts.com/crash/m/macknet/ > > > > -- Jim W My opinions are just that; not my employer's or my wife's! !! Do not assume that your freedoms are assured !! The truth is out there Brew and Let Brew; Homebrewing is Fun -- For a Hot Time: EAT CHILES