Replacing Blue Tap Cartridge and can't Find the Correct one All aspects of plumbing questions and answers, help, tips and information

[Reddwarf4ever]

New replacement but does not locate on lugs

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Old cartridge

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Trying to replace the blue cartridge in a tap, bought a replacement, but can't get the two pins / lugs to line up. Tried the old ( broken ) cartridge and the two pins / lugs latch in perfectly.

Can someone please help me identify the correct cartridge or help me with a solution

Many thanks in advance