Geoman wrote:
I HOPE YOU CALLED MOEN and got the part for free. All their systems
have a lifetime guarantee and they send the parts right to your home
for any product they sold to you.

Geoman is right! I've got all Moen faucets in my home, and in 20 years
I've never paid to replace a cartridge or other faucet part. Not that
there have been that many failures, but Moen is great about standing
behind their products.