Hello I'm doing a bathroom remodel and came across this problem. Not very good with plumbing know very little. No my home was built in 1958 and it has an Eljer faucet. All I want to do was replace the handles with something more modern. After removing a knob it has a stem that sticks out about 4inches from the wall with a lil star shaped end. Now my question is if I unscrew the stem from the brass piping can I purchase a new stem and handles( differnt brand as for I can not locate this kind)? I didn't know if I would be able to just put any kind of stem into that brass fixture and get a handle that matches up or not. I'm really stuck on this. I did purchase a whole in faucet set which has handles and a whole new brass piping that goes behind the was. But the previous home owner sprayed some kind of cement or something on all the pipes back there so there in remove able. Please help