My elderly parents have mentioned that's it difficult to switch the
water between the tub and the shower because the diverter is too
stiff. Their home was built in the early 60's and has the diverter
between the hot and cold taps. The diverter rotates 180 degrees
to switch between the hot and cold.
I went to their house to started to disassemble the diverter. The
disassembly started out like a stem faucet but when it got to the
point where I'd unscrew the stem (diverter) it wouldn't unscrew.
That makes some sense, I think, since the divertor doesn't operate
like the taps do. What's the secret to removing the diverter? Once
I have finally get it apart, what's the secret to restoring smooth