open or closed?" If you have a butterfly or ball valve, the direction of the handle indicates whether the valve is open or closed. If you have a stop or gate valve, it is harder to tell if your valve is open or closed because there are very little to no visual cue...
type of shut-off valve, meaning they can only be used to stop and start flow; not regulatethe flow. Ball valves are perhaps the easiest valve to see if they are open or closed. If the handle on top is parallel to the valve, it's open. Likewise, if the handle i...