Hot water pressure in shower low

[DeadLikeTick]

I have recently bought a 1960s house and am having issues with the hot water pressure in the shower. I have done research online but am having problems finding advices on this specific problem. Pressure to the rest of the house is fine. The fixtures are glacier bay and contain a plastic cartridge which I believe holds the problem but I do not know how to remove it. All other models Ive seen (More recent) have a pin or screw to remove to take out the cartridge. The plumbing to the rest of the house seems to have been replaced when the house was remodeled before selling to us. I would appreciate any help as Im sure anyone can understand the frustration of a shower not living up to its potential. Thanks

Tick

 

[frodo]

is the piping to the shower valve copper/plastic or galvanized ?

 

[JakeSawin]

Replace the cartridge. That's where the problem is.

 

[DeadLikeTick]

Replace the cartridge. That's where the problem is.

If I could only figure out how? I cant find anything to remove... It doesnt turn padt the normal operating limit. Any ideas?

 

[JakeSawin]

Post a pic of the valve and I can explain how