Howdy folks! When the toilet shuts off, I hear a fairly loud water hammer now. Never had that happen before until recently and have not had any plumbing work done. I did a little net research and see that this could cause damage or leaks in the piping, so I'll have to get on this one quick. But before I jump into it head first, I've gotten a lot of good advice here and thought the great mind might have some tips.

A couple of questions -- since it just started, I'm wondering where the air could have come from? I've tried running the water in all the faucets high and low to try and bleed it but don't see much difference.

I've read that it could be on the downstream or upstream side of the valve - do you know any way to tell? Sounds like there are different things to try and I'd just as soon start with the most likely and easiest ones first.

Some more info (pull up a chair, boys, LOL!!)... the toilet, sink & tub all tee into the same line within a couple of feet of each other, but only the toilet hammers. Also, in the other end of the house - about 30 feet downstream of the toilet, the kitchen sink faucet hammers.

Welp, that's my story. Any help or good guess much appreciated.

Bob