VP-RSV-04 Remote Smoke ValveThis is the valve to use to turn your smoke on and off while in flight! Unlike our competitor’s fuel line pinch” type valves, which can allow the fuel line to remain constricted when they open, the VP-RSV-04 Remote Smoke Valve opens fully with unrestricted flow to your muffler every time. Uses four “O” rings for positive seal and long life.Mounting hardware supplied.Requires servo for operation.Used with a mini servo wired to a AUX channel this valve is use for many applications. e.g. smoke systems. “