I just bought a Kuhn Rikon 12L Duromatic Hotel model to make stock.
However, whenever it has past the first red marker it starts to hiss and small whiffs of steam escape from the primary valve (ie.: the one housing the indicator stem). Tightening the screw, pushing down or wiggling the stem during cooking or any other measures didn't help. The documentation states that if this is happening, too much pressure is being build.
Does anybody has the same experience? If that is the case, than the Kuhn Rikon is not able to pressure cook unvented at 15 psi .
