Diverter valve

[LKGfan]

I am trying to replace the diverter valve on my shower. The nut that sits sub flush to the tile is stripped and I can't get it loosened. Any suggestions on how to get the nut removed?

 

[breplum]

sorry. so if you have a deep socket of the correct size and the entire nut is rounded...you may need to replace the entire shower valve from the front or behind.

 

[Geofd]

Can you show pictures of the valve, if you could use a socket on it an it's rounded, could you try those sockets that are made to remove stripped or rounded bolts?????