Hi, thanks in advance
Don't know too much about plumbing but I have a stanadyne faucet in the shower and it leaks I can't take out the "stem" or key don't remember what its called . I went to Lowe's and there is a bunch of those stems but I hnow it's a moen but don't know the size. Any help is appreciated.

Is your faucet Moen single?
If it is let me know I will end you a link and you will be able to replace it yourself, also do you know that Moen Faucets are life time warranty, if you need any part just call them that you are the original owner they will send you the parts in 10-12 days or if you need soon you have to pay for shipping they will sent it express, Thanks.

John