How to Replace A Mixer Cartridge
How do you know what kind of mixer tap cartridge you need?
Firstly, measure the diameter of your existing cartridge. The two main sizes for cartridges are 35mm and 40mm, which relates to the size of the cartridge.
Next, have a look at your existing cartridge, is it flat or raised?
Now, have a look at the bottom of your cartridge. Flat and raised cartridges have a different profile.
Our examples here are of our cartridges, which suit most popular brands of mixers including Brewers, Irwell, Greens, Raymor and many more.
If your end looks considerably different, you may need a special cartridge made by the manufacturer of your mixer. If in doubt, bring your existing cartridge in to your local hardware or plumbing store and ask the staff there, or organise an installation by a registered plumber who will be able to source the correct parts for you. Our plumbing directory can put you in touch with the local plumbers in your area. Click here to search.
So, how do mixer cartridges work?
The answer depends on the type of mixer cartridges involved. Typically speaking, you will have inlet ports for both hot and cold water – these are connected to hot and cold water supply pipes under the sink. A valve stem sits within the cartridge and features passages aligning with the inlet ports. A sealing mechanism covers the inlet ports. When the stem is closed, water flow is blocked. The water mixing action occurs as the stem is adjusted and you allow more or less hot or cold water.
How to install your cartridge
- Turn off water at mains
- Remove handle by removing indicator button
- Use an allen key to unscrew the grub screw
- Unscrew dome cover and locking nut
- Replace the cartridge
- Re-assemble tap
- Turn on water supply and inspect for leaks
