Thanks. I've always wondered why a PVC fitting would have IPS written on it. I called my plumber friend and he couldn't answer that one. He did say that you can tell the thread protectors because they fit real loosely, and go too far on to the thread before they purchase.(I suppose this is an acquired "feel" like us tightening a wirenut). Other than that, his only comment was "It'll leak". Good thing I'm not a plumber 'cause most of mine leak anyway.