[supadart]

Not sure of the name of this, but here goes. It's the knob/valve that redirects the water from the tub fill to the showerhead.

It worked fine until about 1 week ago. Now it allows water to spray from the showerhead and from the tub fill. Lots of water pressure, so the shower is still useable. The knob makes 1.5 turns from closed to open. That hasn't changed. The bolt and retainer that holds it in place are OK too.

I'm assuming the problem lies within the valve.

I'm no plumber, so I wanted to get a bit of input as far as were the problem may be, and would I be able to repair this myself, or is this a job for a pro? Also, is there a technical name for the knob/valve?

Thanks -Gary