Here's the deal. I got a shower control knob that works like Moen. You
pull it out, and the water comes on. Turn right or left to adjust
The "guts" are leaking, and the water drips out the head.
I can't remember the name of it since it was 20 years ago. It is a German
name, we think, maybe Gruen. We THINK the letters in the name are maybe G,
U, and/or Y.
I'll Google in the meantime, too.