German engineering gone off the deep end! The cartridges for this bathroom faucet set are not reversible. One has to purchase a cold side and hot side. There no way to convert one to the other. This makes the Hansa faucets not only expensive to buy, but also expensive to maintain. In one of our powder rooms, I opted to replace the Hansa hardware with that from another manufacturer that has reversible cartridges. I still have 2 other Hansa installations that I decided to keep.

Stopped the leaking faucet

Faucet cartridge worked exactly as stated. Chicago Faucet Shoppe was very helpful with my order.