How do you replace a new cartridge to a minima mixer tapPJH Group?

To replace a cartridge in a Minima mixer tap from PJH Group, first, turn off the water supply and drain any remaining water from the tap. Next, use a screwdriver to remove the handle and then unscrew the retaining nut to access the cartridge. Pull out the old cartridge, insert the new one in the same orientation, reassemble the tap by securing the retaining nut and handle, and finally, turn the water supply back on to check for leaks.