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Moen Posi-Temp Cartridge Part #1112b Replacement

Introduction

Is your shower producing inconsistent water temperature?

Before replacing the cartridge, first check a nearby faucet or shower to see if it is also getting inconsistent water temperature. If it is not, then the problem would be the valve’s cartridge and would need to be replaced.

This guide will take you through the steps of replacing the cartridge of a Moen Posi-Temp shower valve.

This procedure will take you through the plumbing so make sure that you locate the main shutoff valve to the shower or to the house as you would need to turn off the water for this procedure.

What you need

  1. Moen Posi-Temp Cartridge Part #1112b Replacement, Moen Posi-Temp Cartridge Part #1112b: step 1, image 1 of 1

    • Turn the water shutoff valve counter-clockwise to the "off" position.

    Edit

  2. Moen Posi-Temp Cartridge Part #1112b Replacement: step 2, image 1 of 1

    • Open both the hot and cold taps of a nearby faucet or shower until the water no longer flows.

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  3. Moen Posi-Temp Cartridge Part #1112b Replacement: step 3, image 1 of 2 Moen Posi-Temp Cartridge Part #1112b Replacement: step 3, image 2 of 2

    • Turn the handle of the shower valve 180 degrees until it is in the "up" or "on" position.

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  4. Moen Posi-Temp Cartridge Part #1112b Replacement: step 4, image 1 of 2 Moen Posi-Temp Cartridge Part #1112b Replacement: step 4, image 2 of 2

    • Unscrew the handle screw with an Allen wrench.

    • Remove the handle.

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  6. Moen Posi-Temp Cartridge Part #1112b Replacement: step 5, image 1 of 2 Moen Posi-Temp Cartridge Part #1112b Replacement: step 5, image 2 of 2

    • Remove the handle adaptor screw with a Phillips screwdriver.

    • Remove the handle adaptor simply by pulling it out.

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  7. Moen Posi-Temp Cartridge Part #1112b Replacement: step 6, image 1 of 1

    • Pull out the white key/adjustable limit stop.

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  8. Moen Posi-Temp Cartridge Part #1112b Replacement: step 7, image 1 of 3 Moen Posi-Temp Cartridge Part #1112b Replacement: step 7, image 2 of 3 Moen Posi-Temp Cartridge Part #1112b Replacement: step 7, image 3 of 3

    • Gently pull out the stop tube.

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  9. Moen Posi-Temp Cartridge Part #1112b Replacement: step 8, image 1 of 3 Moen Posi-Temp Cartridge Part #1112b Replacement: step 8, image 2 of 3 Moen Posi-Temp Cartridge Part #1112b Replacement: step 8, image 3 of 3

    • Using the Phillips head screwdriver, remove the two screws located at the top right corner and bottom left corner.

    • Remove the metal plate.

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  10. Moen Posi-Temp Cartridge Part #1112b Replacement: step 9, image 1 of 3 Moen Posi-Temp Cartridge Part #1112b Replacement: step 9, image 2 of 3 Moen Posi-Temp Cartridge Part #1112b Replacement: step 9, image 3 of 3

    • Slide the tip of needle-nose pliers under the notch of the retaining clip and pull the clip upwards.

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  11. Moen Posi-Temp Cartridge Part #1112b Replacement: step 10, image 1 of 3 Moen Posi-Temp Cartridge Part #1112b Replacement: step 10, image 2 of 3 Moen Posi-Temp Cartridge Part #1112b Replacement: step 10, image 3 of 3

    • Clamp firmly onto the brass tube with a pair of vice grips and gently but firmly pull out the cartridge.

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  12. Moen Posi-Temp Cartridge Part #1112b Replacement: step 11, image 1 of 2 Moen Posi-Temp Cartridge Part #1112b Replacement: step 11, image 2 of 2

    • Insert the new Moen Posi-Temp cartridge.

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  13. Moen Posi-Temp Cartridge Part #1112b Replacement: step 12, image 1 of 1

    • Insert the new cartridge into the valve assembly.

    • Ensure that the H/C symbols are facing up.

    • Ensure that the notch on the brass tube is also facing up.

    Edit
Conclusion

To reassemble your device, follow these instructions in reverse order.

Author

with 1 other contributor

John Mendoza

Member since: 09/17/20

205 Reputation

1 Guide authored

Badges: 3

Team

York University, Team S3-G57, Melo-Thaiss Fall 2020 Member of York University, Team S3-G57, Melo-Thaiss Fall 2020

YORK-MELO-THAISS-F20S3G57

1 Member

1 Guide authored

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