The Horus Regatta 19101 has two different cartridges. The hot side is fitted with an RS (right-closing) cartridge and the cold side with an LS (left-closing) cartridge. So you need a different part for each side, so pay close attention to which side you're replacing before you order.

RS stands for right-closing and LS for left-closing. This indicates the direction you need to turn the cartridge to shut off the water. On the Horus Regatta 19101, RS is on the hot side and LS on the cold side, so it's important that you order the correct type for each side.

Yes, this tap has also been marketed under the type numbers MK19101BM, MK19101I and MK19101CH. The parts we offer fit all of these variants, so you can order with confidence if your tap has one of these type numbers.

First check which side of the tap you want to replace the cartridge on: the hot or the cold side. Then look at the turning direction of the old cartridge or compare the part itself. Still not sure? We're happy to help you make sure you order the correct RS or LS cartridge.

Yes, you can easily replace the cartridge yourself without a plumber. First shut off the water supply, remove the handle by unscrewing the cap on top (fraud/CHAUD) and loosen the screw. Then pull off the handle, unscrew the old cartridge, and fit the correct RS or LS cartridge in its place. Make sure you use the right type for each side to prevent leaks.

If you're not sure, feel free to contact us and send photos of your tap. We'll take a look and figure out what you need.