How do I replace this???

[BlakeShred]

Homeowner here, I'm NOT a plumber, but I was hoping I could find someone on a forum to help me as I've had high success rates in the past with this.

Please see attached pictures.

So one morning I was taking a shower, and the handle straight up snapped off. This is what I am left with. I could not figure out how to remove the cartridge and I don't know what type/style it is to look it up. We have been showering in the basement for about a month now and we are very ready to get this thing taken care of.

I bought a brand new shower valve kit, not sure if it's the right kind or if it would just be easier to replace just the cartridge and handle? I have no knowledge on how to do any of this so any help is appreciated. Thanks in advance.

Side note, this shower is the only water source in the entire house that has low water pressure, related? Not sure.

 

[CT18]

You need to be able to access that diverter from the backside. It needs to be cut out and the new diverter soldered on. You may have better luck with replacing the cartridge. You may want to get a plumber in there to get that cartridge out. Before you attempt to pull the cartridge make sure the water to the diverter is turned off