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Replacing a thermostatic coaxial cartridge in a 2, 3 and 4-way valve

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This article explains step-by-step how to replace a coaxial thermostatic cartridge in a 2, 3 and 4-way valve, whether it is model prior to April 2013 of after.
Preparation

  • Important: Turn off the water supply at the faucet before starting. You can either turn off the main supply to the house or close the shut-off valves if the faucet is equipped with them. Then open the faucet again to empty it of residual water. Failure to do so could result in flooding or injury. 

  • Recommended tools: 2.5mm allen key, Phillips and flathead screwdriver (if you remove the plate), adjustable wrench, soft brush
Instructions:
  • Step 1 - Identify and disassemble handles
  

Identify

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  • Volume handle : Lever or knob
  • Temperature handle : Lever
  • Exposed screw cap : Yes

Disassemble

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Identify

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  • Volume handle : Lever 
  • Temperature handle : Textured dial
  • Exposed screw cap : Yes

Disassemble

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Identify

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  • Volume handle : Lever 
  • Temperature handle : Knob
  •  Exposed screw cap : Yes

Disassemble

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Disassemble

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 Identify

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  • Volume handle : Lever, knob or cross 
  • Temperature handle : Knob
  • Exposed screw cap: No

Tip : To remove the temperature knob:

a) press down        

b) lift up

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Disassemble

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Disassemble

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 Disassemble

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  • For this model, no need to remove the temperature cap handle.
  • Step 2: Remove the plate (if you are shutting off the water supply through the service valves; if you are shutting off the water supply main to the house, go to step 4).
 Plate without exposed screws

A or B

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1) Remove finish plate

2) Unscrew screws

3) Remove back plate
Plate with exposed screws

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1) Unscrew screw caps

2) Unscrew screws

3) Remove plate
Step 3: Shut off water supply through service valves
Single handle assembly valve

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  • Using a flathead screwdriver, turn the service valves 1/4 turn to bring them upright. Then open the tap to empty the residual water

 

  • Service valve models may differ from those shown, but the way they open and close is the same.
Double handle assembly valve

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  • Using a flathead screwdriver, screw completely the service valves. They will be accessible from an angle. Then open the tap to empty the residual water
Step 4: Remove trim (according to model), nut. cartridge and clean

2-part model

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a) Unscrew the decorative ring

b) Slide out sleeve

1-part model

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Slide out sleeve

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  • Unscrew the retaining nut

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  • Pull out cartridge

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  • Inspect interior and seat, remove debris and/or blue gasket and if necessary, clean with a soft bristle brush.

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  • Flush the valve and lines by slightly opening the service valves on each side alternately for 20 seconds (See step 3). Be careful not to burn yourself
  • Step 5: Identify and install cartridge
A  2, 3 or 4-way valve - From April 2013 to today
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 Insert the new cartridge while making sure that the red check valve is on the hot side and blue on the cold side
B  2-way valve only - From April 2013 to today

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  • Insert the new cartridge (B), ensuring that the 2 position pins are aligned with the 2 position holes in the rough
 
  • Step 6: Reassemble

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  • Tighten the retaining nut

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  • Make a mark with a pen

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  • Tighten 1/4 turn more with a wrench. It is normal to see threads between the nut and the sleeve.
  • Open the service valves and reassemble the valve trim ensuring that the decorative ring is correctly positioned.

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  • Reassemble handles in reverse order
 Tip: 

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  • If the cartridge you received has a smooth tip (pin) and yours doesn't, or vice versa, you can remove or add it. If you need to add one, use the one on your original cartridge. This smooth tip is screwed to the end of the cartridge and is used to hold the temperature lever.

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Contactez-nous/Contact Us:

Canadian Consumers: Email or Call 1-866-473-8442

U.S. Consumers: Email or Call 1-800-777-9762