Other causes might be issues with the valve seat.
Ceramic disc taps dripping.
The majority of modern taps now use ceramic disc cartridges as opposed to rubber washers to prevent dripping.
I have written a post detailing the reasons for this here if you find that your cd valve is dripping or that it is grainy in its operation you may need to service it.
Ceramic disc taps feature a cartridge within the tap that contain a pair of ceramic discs.
It wastes water makes those nasty marks on your sink and that constant drip dripping noise can drive you mad.
Disassemble the faucet and take the old parts with you when you go shopping for replacement parts so you can get exactly what you need.
There is nothing more irritating than a dripping tap.
A disc retaining washer b ceramic discs c o ring which stops any water seepage up to the head of the tap d valve retaining nut e spindle on which the handle sits.
How to check the cartridge in a dripping ceramic disk tap.
You will need a settable sized or adjustable spanner.
Want to find out how to fix a dripping tap.
For loads more how to videos head.
Then this tutorial can help showing you how to replace to a ceramic disc tap.
If you have one of these modern easy to turn on taps it s likely the ceramic disc inside will need replacing.
One of these discs remains in a constant fixed position and the other rotates when the handle is operated.
To fix a ceramic disk faucet you can get new seals and replacement parts.
This could be from mineral deposits or a poor installation.
Watch this video tutorial to learn how to repair a ceramic disc tap yourself.
Ceramic disk faucets are durable but need repairing if they develop leaks or water flow problems.
If your tap is newer and more modern you ll probably have a ceramic disc tap which is also susceptible to wear and tear and can cause dripping.
Ceramic disc valves are widely used in new taps.
In photo 2 we can see the parts we are concerned with.