How to Replace a Shower Valve Cartridge

Written by: Erica Spangler

Design Specialist
Follow Muir's step-by-step instructions for replacing a shower valve cartridge

  • Tools/Materials
    • New shower valve cartridge
    • Allen wrench
    • Screwdriver
    • Needle nose pliers
    • Locking pliers or standard pliers

Reduced water pressure in the shower could indicate that you need to replace the shower valve cartridge. Yes, it sounds a little intimidating, but we know you can easily do this without having to call your contractor.


Step by Step Instructions

Step 1


Remove the handle. Determine the tool you’ll need for this, as it’s commonly an Allen wrench or screwdriver.



Step 2
With a screwdriver, remove the screw at the end of the valve.





Step 3

Remove the parts inside the valve housing.

Step 4

Remove screws on trim plate and carefully remove the plate itself.



Step 5

Determine if your valve has water stops. If it does, turn off the water flow by tightening the screws. If your valve does NOT have water stops, turn the water off at the main.


Step 6

After you’ve turned the water off, remove the valve clip using a set of needle nose pliers.


Step 7

Using a pair of locking pliers (or standard pliers) get a strong grip and pull the old cartridge out.

Step 8

Insert the new cartridge using the method outlined in the manufacturer-issued installation instructions.


Step 9

Replace the clip, and turn the water stops back on (or turn the water back on at the main).



Step 10

Replace the trim plate, and reassemble the parts exactly as they were when they were removed, and reattach the handle.


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