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How to Replace The Stuck Retainer Clip on the Moen 1200 Shower Cartridge

By Tuan Do

When your Moen shower faucet starts to drip or becomes hard to control, the issue could very well be with the cartridge. The Moen 1200 is a single-handle brass cartridge that’s known for its durability. However, with time and use, even the most robust components can face issues. One common problem is a stuck retainer clip which can make removing and replacing the cartridge a bit challenging. This guide will walk you through the steps to replace the stuck retainer clip and ensure your shower is functioning optimally.

Tools and Materials Needed:

  • Needle-nose pliers
  • Screwdriver
  • Penetrating oil or a lubricant like WD-40
  • Replacement retainer clip (if the original is damaged)

Steps to Replace the Retainer Clip:

  1. Turn Off the Water Supply: Before you start, it’s essential to turn off the water supply to the shower to avoid any unexpected sprays or leaks.
  2. Remove the Shower Handle:
    • Locate the set screw at the base or back of the shower handle.
    • Use the appropriate screwdriver to loosen (but not completely remove) the set screw.
    • Once loosened, gently pull off the handle from the stem.
  3. Access the Retainer Clip:
    • With the handle removed, you should see the cartridge and the retainer clip, which holds the cartridge in place.
  4. Apply Penetrating Oil:
    • If the retainer clip appears stuck or rusted, spray a small amount of penetrating oil or WD-40 around it.
    • Let the lubricant sit for at least 15 minutes to work its way into the stuck areas.
  5. Remove the Stuck Retainer Clip:
    • Using needle-nose pliers, try to grip the loop or tab of the retainer clip.
    • Gently wiggle and pull the clip upwards. The lubricant should make this process easier, but you might need to apply some force if it’s firmly stuck.
  6. Inspect the Retainer Clip:
    • Once removed, check the retainer clip for any signs of damage or corrosion. If it’s damaged, it’s a good idea to replace it with a new one to ensure a secure fit.
  7. Replace or Reinsert the Retainer Clip:
    • If you’re using a new clip, simply slide it into the slot where the old one was. You can find the replacement clip at a local home improvement store or on Amazon.
    • If you’re reusing the old clip (assuming it’s in good condition), clean it off, and slide it back into place.
  8. Reassemble the Shower Handle:
    • Slide the shower handle back onto the stem.
    • Tighten the set screw until the handle is secure.
  9. Turn On the Water Supply: Turn the water supply back on and test the shower to ensure there are no leaks and that the handle operates smoothly.

Tips:

  • Always turn off the water supply before working on any plumbing fixtures.
  • If you find that the cartridge itself is damaged or corroded, consider replacing it along with the retainer clip.
  • If the retainer clip is proving too challenging to remove, it might be wise to call in a plumber to avoid damaging other components.

Conclusion

Dealing with a stuck retainer clip on the Moen 1200 shower cartridge can be a tad frustrating. However, with the right tools and a bit of patience, you can replace it yourself and restore your shower’s functionality. Always remember, when in doubt, seeking the help of a professional is a safe bet.

Disclosure: We might earn commission from qualifying purchases. The commission help keep the rest of my content free, so thank you!

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