[royharvey]

I have a shower faucet with a moen cartridge which has not been used for a while. It is stuck. I cannot pull it out to open the water valve to the shower. I have tried pouring boiling water on it and pulling.

[speedball1]

I have a shower faucet with a moen cartridge which has not been used for a while. It is stuck. I cannot pull it out to open the water valve to the shower. I have tried pouring boiling water on it and pulling.

The reason the cartridge's stuck is because the "O" rings have swelled and are binding the cartridge. It will take a Moen Cartridge Puller,(see image) to remove it. You may purchase one at a plumbing supply house or rent one from your local rent center. Good luck, Tom

[Milo Dolezal]

Agree with Tom. After you remove the old cartridge, and before you install new one, put lots of plumber's grease on O-rings and cartridge itself. Also, use plastic cartridge instead of brass.