Thanks.
A few more questions about this, Ive also been having an issue with the water pressure in my house where I shut the water main off, and the pressure doubles for about a week then goes back to normal. Its happened a few times. Lately, there have been times where I turn a faucet on, and we have no pressure for about a minute, then all of the sudden I hear the hiss, and the water pressure comes back to normal.
Does it sound like this pressure valve is the culprit? Do you think this could all be caused by the bad gasket, or does it sound like the whole thing is bad?
If so, are these things easy to replace, or should I leave it to a pro. I have a little plumbing experience, but i'm definitely no pro.