Thanks, guys. I'll order one of these things tomorrow and as soon as it gets here (probably by the end of the week) I'll give it a shot on installation (hines was right on about the price -- I was quoted $370 for the fix and while I don't mind paying for someone to do it this time, I'm guessing this won't be the last time one of the three of these valves I have goes bad so I might as well learn how to do this myself).