Information on Quarter-turn Ceramic Cartridges

How to Differentiate a Cold Cartridge from a Hot Cartridge

Hot and cold quarter turn ceramic cartridges look the same, but they turn in opposite directions. The cold cartridge opens in the clockwise direction while the hot cartridge opens in the counter-clockwise direction.

To determine whether a cartridge is cold or hot, look for a blue or red mark on the cartridge. A blue mark indicates a cold cartridge while a red mark indicates a hot cartridge.

If a blue or red mark is not present on a cartridge, hold each cartridge upside down in your hand, then turn the bottom end with the ridges and observe which way the cartridge opens. A cold cartridge opens in the clockwise direction while a hot cartridge opens in the counter-clockwise direction.

Replacing Cartridge on Faucet with Cross Handle

Using a Socket Wrench to Remove a Cartridge

Highly recommended tool: 17mm socket with long handle.


Replacing Cartridge on Concealed 1/2" Thermostatic Valve Assembly

Highly recommended tool: 17mm socket with long handle.


Replacing Cartridge on Exposed 1/2" Thermostatic Valve Assembly

Highly recommended tool: 17mm socket with long handle.


Finding Parts

We can help you find the parts that you need:

  1. Take photos of the parts and circle them.
  2. Take photos of the surrounding faucet and any documentation.
  3. Email us the above photos by clicking coventrybrassworks@gmail.com and describe your issue.

We will research which parts you need and reply back.