How do you replace a shower valve?

i would advise that you get some Teflon tape at the hardware store this will help seal the screws so water doesn't leak out when you turn it on. 1. first you need to unscrew the shower head off.2. then wrap the screw threads in the Teflon tape(this part can be a little tricky and if you know anything about telfon you can quess why).3. then just srcew they new shower head on but make sure you do it nice and tight.

that's for your standard shower head but if you have one of those hose shower heads there some extra steps and a lot more teflon. 1. do steps 1-2.2. then but on the base that holds the shower head. 3. then wrap teflon on the part of the hose that goes in the base.4. put hose in base.5. attach hose to head then put head in base holder.

That how you but on a new shower head.