Double-handle cartridge faucets work in the same way as compression faucets. They both contain separate handles for hot and cold water. However, cartridge faucets are far smoother and more consistent. You simply turn these faucets halfway to turn the water on and off. This type of faucet operates by the cartridge, a plastic piece located within a valve connecting to a handle. When you turn a faucet handle, the handle will move the cartridge within the valve—this operates the flow of water leaving the faucet.