I actually found a bad poppet last week. The oring, or seal, was bulging out of it's recess. You can take the bottom triangle piece (that rests on the In or Out post) off the main post of the poppet with some force, then the post will slide out of the spring and separate from the ss top and split the two sections that sandwich the seal. Then if you can find a replacement you could reassemble. But I don'tsee replacement seals on any of the websites. I just threw the poppet away and will buy a few more. They're $3-$5.