arduino controlled valve

I need to measure the pressure exerted by the faucet, and when it reaches a certain pressure, I need the faucet to close and stop the water flow. I already found a device to measure the water pressure with the arduino, I just need to find a controlled valve that I can use with the arduino. Can someone please help me find this valve? Thanks in advance!

Found the answer here: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1217238977