Electric Valve 3volt Help

[George_1985]

-Hi , I want to make a watering system in my garden with moisture sensor , electric valve and iris or telosB sensors to control the valve.

-I am in decision to buy the electric valve , the matter is that i want to control the flow of water to irrigate with a voltage 3 volts, because so (3volts) is the voltage of sensors iris/telosB that will be used.

-Could anyone suggest me an electric valve like this (for my situation) , is there anywhere such an electric valve to buy?

Thank you.