1/2" DN15 2 Way 12VDC CR2-01 Brass NPT Reverse Polarity On/Off Electrical Motorized Ball Valve

I liked the fact that it only draws current to operate either open or shut not to be kept energised in either state. I use the unit wired into the house alarm system which shuts the valve whilst we are absent from the house hence preventing any accidental water leaks during our absence. It is programed with a 2hour time delay on shutting off to allow for a dishwasher or washing machine to complete it's cycle if they are still operating at departure time.