The present invention is a water conservation safety shut-off valve assembly for use on locations which normally have intermittent water usage but need to indicate when there is constant water usage, such as a leak. The valve assembly has a valve body with a fluid pathway and a valve plug held in an open position allowing water to flow through the pathway. As water flows through the pathway, a flow detection switch monitors water flowing through the pathway and begins timing duration of water flowing through the pathway. If the water flow through the pathway stops, the timer value is reset to zero. If the water flows through the pathway, and the timer circuit reaches a predetermined value, the valve closes the pathway, stopping the flow of water through the valve assembly.