The little rubber washer is broken in my shower diverter, and it seems no stores have what I need. I have checked mednards, ace and Lowe's. I would like to know how to find the right part, what it is called and where to get one. I have looked online, but they do not look like the one out of my spout. Also I am wondering why is ripped and if there is something I can do to abvoid it in the future? Thank you!

Tom, I think poster means Spout with Diverter on top of it...

Yes, indeed, it is a tough one. You will be better off buying brand new spout than look for replacement parts. But if you still want to replace the broken part only - I would call manufacturer. This way you'll get exactly what you need. Otherwise, I wouldn't even know where to send you for spout-diverter replacement parts...

Good Luck and let us know what you did... Milo

Sorry about that! I misunderstood the question. Do you have a slip on or threaded spout,(see images)? Let me know, Tom