I like the sound of the pressure relief hole. I will pop in and putter around.
The closest HD to us is terrible. If you can find anyone, they usually will hear the question then turn and read labels. Uh. I already did that, I was looking for a little clarification... it's also largely staffed by high school students or recent grads so not a lot in the "experience" department that we used to go there for. The 2 exceptions are electrical and plumbing.