How to Change a Moen Shower Cartridge 1225

Changing a Moen shower cartridge is a relatively straightforward process that can help resolve issues such as leaks and inconsistent temperature control. This article will guide you through the steps involved in replacing the Moen 1225 shower cartridge. The information provided in this article is sourced from reputable plumbing forums and repair guides, including Terry Love Plumbing Advice & Remodel DIY & Professional Forum, Moen Solutions, and iFixit Repair Guide.

Preparation

Before starting the cartridge replacement process, it is important to gather the necessary tools and take some precautionary measures:

1. Turn off the water supply shut-off valves to ensure water flow is stopped.
2. Gather the recommended tools: a Phillips screwdriver and an adjustable wrench.
3. Remove the shower handle and associated handle pieces to access the cartridge.
4. Cover the drain with a cloth or plug to prevent any small parts from falling down it.

Disassembly

Follow these steps to disassemble the Moen shower cartridge:

1. Pull the stop tube forward to remove it from the valve body.
2. Slide the “D” washer off the stem of the cartridge.
3. Lift the tab at the top of the U-shaped copper-colored retaining clip just enough to fully remove it. Be cautious not to drop the clip behind the wall. If access to the copper clip is limited, you can remove the escutcheon plate instead. Use a Phillips screwdriver to remove the escutcheon screws and then pull the escutcheon plate off.
4. Use the plastic twisting tool provided in the 1225 cartridge kit to rotate the cartridge 1/4 of a turn (90 degrees) in either direction. This twisting motion helps loosen the cartridge. Once twisted, remove the twisting tool from the top of the cartridge.
5. Pull out the stem of the cartridge until it stops. You may need to use pliers to grab the stem of the cartridge and exert some force to remove it.

Assembly

Follow these steps to assemble the new Moen 1225 shower cartridge:

1. Slide the new cartridge into the brass valve body. Use the twisting tool to ensure the cartridge is positioned correctly in the valve body. The plastic tabs on the cartridge should align with the slots on the valve body, located at the 12 and 6 o’clock positions.
2. Gently slide the copper clip back into the brass valve body on top of the cartridge. If you encounter resistance, do not force the copper clip. It may indicate that the cartridge is not properly aligned. The water supply should not be turned back on until the copper clip is correctly installed.
3. Rotate the stem of the cartridge so that the small notch is facing downward. This notch determines the hot and cold orientation. If the hot and cold functions are reversed, rotate the stem of the cartridge 180 degrees.
4. Slide the “D” washer onto the stem of the cartridge. Then, slide the stop tube back onto the valve body.

By following these steps, you should be able to successfully replace the Moen 1225 shower cartridge and resolve any issues with your shower’s performance.

Sources:

• Terry Love Plumbing Advice & Remodel DIY & Professional Forum: https://terrylove.com/forums/index.php?threads/moen-1225-cartridge-replacement-tips-please.36947/
• Moen Solutions: https://solutions.moen.com/Article_Library/1225_Cartridge%3A_Single_Handle_Shower-Moentrol_Valve
• iFixit Repair Guide: https://www.ifixit.com/Guide/Moen+Single+Handle+Faucet+Cartridge+(Model:+1225)+Replacement/162826

FAQs

Why would I need to change a Moen shower cartridge 1225?

You may need to change the Moen shower cartridge 1225 if you are experiencing issues such as leaks, inconsistent water temperature, or difficulty in controlling the water flow.

What tools are required to change a Moen shower cartridge 1225?

The tools required to change a Moen shower cartridge 1225 include a Phillips screwdriver and an adjustable wrench.

How do I prepare before changing the Moen shower cartridge 1225?

To prepare for changing the Moen shower cartridge 1225, turn off the water supply shut-off valves, remove the shower handle and associated pieces, and cover the drain to avoid losing any small parts down it.

What are the steps to disassemble a Moen shower cartridge 1225?

The steps to disassemble a Moen shower cartridge 1225 include pulling the stop tube forward, sliding off the “D” washer, removing the retaining clip or escutcheon plate, and using the provided twisting tool to rotate and remove the cartridge.

How do I assemble a new Moen shower cartridge 1225?

To assemble a new Moen shower cartridge 1225, slide the cartridge into the brass valve body, ensure proper alignment with the plastic tabs and slots, gently slide the copper clip into place, rotate the stem for hot and cold orientation, and reattach the “D” washer and stop tube.

What should I do if I encounter resistance while sliding the copper clip back into place?

If you encounter resistance while sliding the copper clip back into place, it may indicate that the cartridge is not properly aligned. Do not force the copper clip, and ensure the cartridge is correctly positioned before proceeding. The water supply should not be turned back on until the copper clip is correctly installed.

Can I reverse the hot and cold functions if they are swapped after replacing the Moen shower cartridge 1225?

Yes, you can reverse the hot and cold functions if they are swapped after replacing the Moen shower cartridge 1225. Simply rotate the stem of the cartridge 180 degrees so that the small notch is facing downward.

Are there any additional resources or guides available for changing a Moen shower cartridge 1225?

Yes, there are additional resources available for changing a Moen shower cartridge 1225. You can refer to reputable plumbing forums, online repair guides, or consult professional plumbers for further assistance.