Quote Originally Posted by Irving View Post
That's the thing Jerry, I can't adjust it and I assume it came with the 10lb. Do I need the 15lb before attempting to can?
Take a closer look. they come in two styles, round and tree. The round one has 3 holes and the tree type one should be in 3 pieces. If it is only a tree type and is solid those are used for most canners that have a dial gauge as well. They are set to start relieving pressure @15 lbs so the real blow off does not go.

Post a couple of pics.