The diverter valve on DW's bathtub that feeds a handheld shower head has died. Pulling the handle off, the valve stem spins in place, in either direction, as long as you care to turn it. It appears that there is a retaining nut with an internal hex drive that one would remove to pull out and inspect the valve stem. I suspect something in there that actually switches the water from one place to the other is disconnected or broken.
Question is, how do you remove that nut? A big allen wrench would be perfect, but there's a valve stem in the way. One of those tube hex wrenches for shower valves should work, but I have found no source for one that is small enough. I've googled plumbing supply sites until my googler is sore. Of course the request to fix it came after the real plumbing places closed for the day. I have the feeling that I'm missing something obvious.
If we hadn't recently paid a lot of money for that valve I'd just put a pipe wrench in the outside of it, but I don't think the resulting dings will meet with approval.
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