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For the full breakdown, see our best Bathroom Tap Cartridge guide.
How Do You Know the Cartridge Is the Problem?
Tools and Replacement Parts
| Tool | What It’s For | Handy Tip |
|---|---|---|
| 2 mm or 2.5 mm Allen key | Undoing the grub screw that holds the handle | Both sizes are common; try whichever fits |
| Adjustable spanner | Removing the retaining nut under the shroud | Cloth over the jaws protects the chrome |
| Pliers or needle-nose pliers | Pulling clips and stubborn cartridges | Grip the cartridge body, not the pipes |
| Soft cloth | Protecting finishes and catching small parts | Lay one
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