How a faucet controls temperature and flow at the same time

Simple, elegant design at its finest. Understanding the mechanics behind basic household items is so satisfying

Hmm, a fun fact that I didn’t know 🧐

The engineering triumph here is the ceramic disc cartridge. Two micro-polished alumina ceramic plates slide across each other without rubber washers degrading — rotating shifts the hot/cold overlap ratio, while lifting expands the combined flow opening.

Faucet goes back to Old French fausset, a stopper for a cask. English records it between 1350 and 1400.