That's the problem. Because there are so many different types where the spline count (the "teeth" that have to match up with the head) is different or the diametre of the spindle is different, we usually take the faulty cartridge to the merchant and match one up.
Depending upon location and when paying a plumber to do the job that is sometimes uneconomical so sometimes it's better to change the whole tap. I'm not saying you'll have to do that, just that it is a possibility.
I'll have a quick look and see if I can find your tap and if there is a recommended cartridge for it though.
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OK, I've found your tap and all the technical information but as usual, there is no proper information for the cartridge it uses so again, as usual, the cartridge will either need to be removed and taken to a plumber's merchant for matching or the whole tap replaced.
Whilst your plumber is there and they have isolated the tap for you and removed the cartridge you could take it to the merchant yourself. If they don't have the one you need at least you will be in the right place to get advice or pick up a new tap.
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