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Moen Solutions

K8-Standard Handle Adapter And Cartridge- Removal And Installation

Standard adapter.png

 Tools Needed:

Large Pliers or Channel Locks

                                                                                                      large pliers.png         channel locks.png

7/64" Allen Wrench

764 allen.png

Flathead Screwdriver


Small Brush


Uninstalling the Handle & Adapter


k8 line.png

Cap  cap.png

Temperature Indicator

 temp indicator.png

Handle Screw       

handle screw.png





Phillips Screw






Pivot Retainer

pivot retainer.png

Pivot Stop

pivot stop.png

Retainer Nut

retainer nut.png

"D" Washer

d washer.png

1225 Cartridge




Identifying Your Handle

Use the Photos to determine your handle style

Screen Shot 2019-02-20 at 12.08.59 PM.png

If you have the “plug button” style handle, go to step 1.

Screen Shot 2019-02-20 at 12.09.10 PM.png

If you have the “cap style” style handle, go to step 3.

  1. Using fingers or a flathead screwdriver, pry off the Moen plug bottom from the front of the handle. Use a 7/64” Allen wrench to remove the screw If there are two holes, the screw will be in the larger hole. Then, lift off the handle.
    plug handle removal.png
    handle removal .png
  2. To continue with the removal of the handle adapter, please move to step 4.
  3. Using your fingers or a flathead screwdriver, pry off the thin cap on the top of the handle. Use a 7/64” Allen wrench to remove the screw and then lift the handle off.
    handle diagram allen.pngallen removal.png
  4. By hand, pull upwards on the handle dome until it pops off.
    Standard Handle Adapter and Cartridge17.png

Caution: This might pop off suddenly. Be sure not to have anything above the handle dome.

  1. Unscrew and remove the black Pivot Retainer
    Standard Handle Adapter and Cartridge18.pngStandard Handle Adapter and Cartridge19.png
  2. Unscrew and remove the Phillips screw.
    Standard_Handle_Adapter_and_Cartridge20.pngStandard Handle Adapter and Cartridge21.png
  3. Remove the handle adapter and connector assembly.
    Standard Handle Adapter and Cartridge22.png
  4. Next, lift off the white or gray Pivot Stop.
    Standard Handle Adapter and Cartridge23.png
  5. Unscrew the Retainer Nut and remove.
    Standard Handle Adapter and Cartridge24.pngStandard_Handle_Adapter_and_Cartridge25.png
  6. If you are only replacing the handle mechanism pieces, please move to step 20. If you need to replace the 1225 cartridge, please move to step 11.
    Standard Handle Adapter and Cartridge26.png

Uninstalling the 1225 cartridge

11. Caution: Always turn your water supplies off before disassembling your faucet. With the supplies turned off, move your faucet’s handle to the “on” position to relieve pressure.

  1. If there is a double-D washer, slide this off of the top of the cartridge stem.
    Screen Shot 2019-02-20 at 12.26.01 PM.png
  2. Locate the U-shaped copper clip on the top of the faucet. Slide this out to remove.
    Screen Shot 2019-02-20 at 12.22.15 PM.pngScreen Shot 2019-02-20 at 12.22.33 PM.pngScreen Shot 2019-02-20 at 12.22.45 PM.pngScreen Shot 2019-02-20 at 12.22.56 PM.png
  3. Using the twisting tool provided in the 1225 cartridge kit, rotate the cartridge ¼ of a turn in either direction. This should place the plastic ears on the end of the cartridge at the 9 and 3 o’clock position.
    Screen Shot 2019-02-20 at 12.28.24 PM.pngScreen Shot 2019-02-20 at 12.28.44 PM.pngScreen Shot 2019-02-20 at 12.28.57 PM.png
  4. Grab the cartridge stem with pliers and pull the cartridge out. This might move easy at first, and then require more effort. Keep pulling until it pops out. 

Caution: This may pop out suddenly. Be sure not to have anything above the cartridge.

Screen Shot 2019-02-20 at 12.30.47 PM.png

  1. Clean the inside of the valve body with a soft bristled nylon brush (e.g. old toothbrush), to remove any calcium buildup. After cleaning, place a bowl on the open valve to redirect any water splash into the sink. Then, turn on water supply lines slightly to flush clean water through the open valve.

Reinstalling the 1225 cartridge

  1. Slide the new cartridge into the brass valve body. Insure the plastic ears on top of the cartridge end up located at the twelve and six o’clock positions.
  2. Slide the copper clip back into the valve body on top of the cartridge. If you have trouble installing this, please refer to the special note at the end of this document.
  3. Slide the double-D washer onto the brass cartridge stem.
    Screen Shot 2019-02-20 at 12.26.01 PM.png

Reinstalling the Handle Mechanism

  1. On the cartridge stem, locate the small notch at the end of the stem. This is on one of the flat sides. Rotate the cartridge stem so the small notch is facing forward.

    notch on 1225.png Small notch on cartridge stem
    small notch forward.png


  2. Reassemble the bearing washer into the Retainer Nut. The lip of the bearing washer goes into the Retainer Nut first. Then hand tighten the retainer nut back onto the faucet. Next, use pliers to tighten this an additional 1/8 of a turn.

    Retainer nut.png
    The lip is on the top and goes in first lip.png


  3. Place the pivot stop onto the retainer nut so that it lays flat. The “wall” around half of the pivot stop should be located at the front and on top. When slowly rotating this from side-to-side, you should feel it settle into place when perfectly centered.
    Screen Shot 2019-02-20 at 12.40.05 PM.png Screen Shot 2019-02-20 at 12.40.12 PM.png

    "Wall" Faces toward the faucet


Reinstalling the Handle Adapter and Handle

  1. If the black U-shaped connector and handle adapter are already put together, please move to step 24. If not, ensure the black connector is snapped on the lower bar, as shown in the pictures. The smaller hole should be on the top of the connector.


    Handle Adapter

    Lower Bar lower bar.png



    Small Hole small hole.png



    ac .png


  2. Slide the black handle connector onto the stem of the cartridge. The Handle Adapter and Connector assembly will now sit on the pivot stop. The large hole on the handle adapter will now face forward with the bottom tab facing the back of the Handle Adapter facing towards the back of the faucet. Screw the Phillips screw down through the connector and tighten; ensure this is very tight.

  3. Finish reassembling the handle by reversing steps 5 to 1. For the “plug button” style handle, first refer to the special note below.

Special Note for “Plug Button” Style

Right before installing the handle, push the handle adapter back slightly to reveal the hole on the front of the handle adapter. This will allow for easier access to the hole on the front of the Handle Adapter.
Screen Shot 2019-02-20 at 12.55.27 PM.pngScreen Shot 2019-02-20 at 12.55.35 PM.png


Special Note for Reinstalling the Cartridge Clip

If the cartridge clip will not go all of the way in, there are two possible causes for this. Check the following and adjust to make correct:

  1. The plastic tabs of the cartridge must be positioned perfectly at the twelve and six o’clock positions.

Solution: If the tabs are not correctly aligned, us the plastic twisting tool to rotate the cartridge and perfectly align the tabs at the twelve and six o’clock positions. Plastic tabs positioned correctly
Cartridge Clip.pngPlastic tabs.pngPlastic tabs 2.pngPlastic_tabs_3.png

  1. The plastic tabs of the cartridge must be at the same level or lower than the brass valve body.

Solution: If the tabs are above the brass, use the plastic twisting tool to push down on the cartridge. This evenly distributes the pressure to the cartridge shell.

Plastic tabs positioned correctly ptc.png
Plastic tabs pt.png