A: Most pullout kitchen faucets have a vacuum breaker. Therefore, once you turn the faucet off it will drip for a few seconds to let any residual water out of the hose. This ensures a continuously clean faucet spout extending the life of your faucet.
A: Both valves will protect you from a drastic temperature change should someone flush a toilet or turn on water while you are in the shower. Pressure balance valves will balance the hot and cold based on pressure. Thermostatic valves sense the temperature shift and balance the hot and cold water accordingly.
A: There are a number of choices beyond the traditional chrome finish. These include brushed nickel, oil rubbed bronze, matte black, even vibrant colors mixed with chrome.