3. Valve type
Ceramic disk valves are the latest faucet technology. Two ceramic disks control the water flow and form a seal when locked together. They are the most expensive valve type, but the most reliable. Compression valve faucets are the cheapest, but most prone to leaks. Ball valve faucets have a rotating ball that regulates water flow. Cartridge valve faucets use a rubber O-ring to control water flow.