My experience level is novice at best. I've done basic stuff: installing faucets and toilets in my own home while remodeling. If it's just a matter of taking things out and putting new things in, I can handle that. Never messed with hooking up drains or water lines, I leave that to the professionals. That said, this seems like an "easy" fix (haha) if I can just get this cartridge out and put a new one in.
Symptoms with my shower:
- When this valve is turned to "shower", a significant amount of water still comes out of the bathtub spout
- Water from the spout is pure hot water
- Diminished showerhead flow & lack of hot water
What I've tried
- Turn off water to the house (I have no access to these lines in the wall, there's no access hatch)
- Unscrew the hex nut on the shower/tub handle, and removed the handle
- Unscrew the bits holding the outer plate in place and remove all that
Photos below are what I'm left with. This is embedded fairly deeply into the wall and I can't see any further in. I don't know if there's a clamp or another hex nut holding things in place and even if there is, I'm not sure I could get to it.
It doesn't seem to want to turn counter-clockwise anymore. I didn't force it because I don't want to break anything.
Basically, looking for advice before I proceed. Thanks in advance!
Little more info: This house was built in Michigan 1977 and this is the original fixture. I don't see any sort of brand, serial number, or other identifiable markings on it at all.






