This faucet is leaking under the crystal part when turned on. I figure it probably needs a new cartridge. What kind of cartridge does it take? Thank you.
We know that, I guess I was trying to teach the OP the process for next time, I explained myself poorly.
And by opening it up, it verifies visually which type of Moen valve and cartridge it is, for those who don’t know the trick with the screw pattern, or what Stanadyne means.