I was wondering anyone could help me figure out the type of valve I need. The application is I have two sources of water going into the same reservoir and I want to be able to switch between the two. I am currently looking at Direct-Acting Solenoid Valves 3 way Now I am noticing some say universal and wondering if this is the type I need? What does it mean by universal? I want the water to be able to flow in either direction. In and out. Any suggestions and help is greatly appreciated thanks.