How to Install or Replace Moen M-Core Cartridges

Moen M-Core is a valve system that allows you to customize your shower experience with different trim kits and cartridges that fit your needs and preferences. The M-Core system includes two series: the 2 Series and the 3 Series. Each series has a different cartridge that provides different features and benefits. In this blog post, we will show you how to install or replace Moen M-Core cartridges in a few easy steps.

What are Moen M-Core Cartridges?

Moen M-Core cartridges are part of the M-Core valve system that uses a single handle to control the water temperature and volume. Unlike the Moentrol and PosiTemp systems where the cartridge is included with the valve, the M-Core flow cartridge is included with the trim kit. This means that you can choose the cartridge that suits your shower style and functionality.

The M-Core system includes two distinct series: the 2 Series and the 3 Series. Each series has a different cartridge that provides different features and benefits. The Moen 1212 is a gray cartridge for the 2 Series systems that have no volume control. The Moen 1213 is a blue cartridge for the 3 Series systems that have volume control.

How to Identify Your M-Core Cartridge?

To assist with identifying your M-Core shower system, you can check the installation guide provided with the trim kit or compare it to the details below:

• 2 Series (Installed After Spring 2021)-No Volume Control
  • Escutcheon: Temperature indicators (styles vary) located at the 3 O’clock position.
  • Escutcheon Screws: No Escutcheon Screws
  • Handle Operation: Rotates only-adjusts water temperature
  • Cartridge Number: 1212 (gray)
• 3 Series (Installed After Fall 2020)-Volume Control
  • Escutcheon: Temperature indicators (styles vary) located at the 9 O’clock and 3 O’clock positions.
  • Escutcheon Screws: No Escutcheon Screws
  • Handle Operation: Rotates-adjusts water temperature; Pushed in and out-adjusts force or volume exiting the showerhead or tub spout
  • Cartridge Number: 1213 (blue)

How to Install or Replace Moen M-Core Cartridges?

If you need to install or replace your Moen M-Core cartridge, you can follow these steps:

• Turn off the water supply to the faucet.
• Remove the handle by loosening the set screw with an Allen wrench.
• Remove the escutcheon by pulling it off.
• Remove the cartridge clip by using a flathead screwdriver or needle-nose pliers.
• Pull out the old cartridge by using pliers or a cartridge puller tool.
• Insert the new cartridge by aligning the tabs on the cartridge with the slots on the valve body and pushing it in firmly.
• Replace the cartridge clip by sliding it into place.
• Replace the escutcheon by aligning it with the cartridge and pushing it on.
• Replace the handle by aligning it with the cartridge and tightening the set screw with an Allen wrench.
• Turn on the water supply and check for leaks.

Conclusion

Moen M-Core is a valve system that offers functionality and style choices for your shower. The M-Core system includes two series: the 2 Series and the 3 Series. Each series has a different cartridge that provides different features and benefits. To install or replace your M-Core cartridge, you can follow the steps above or watch the video guides at Moen.com.