'''ValveValves''' isare theparts toggleablethat object incontrol the gameflow that is used to transfer liquids orof gasesfluids. It islets usedfluids asflow thethrough it connectionwhen betweenactive storage(gray) and machines,blocks whichfluids workswhen likeinactive a [[Pipe|pipe]](black). It canmay be turned on or off to control the flow of resourcestoggled by clicking on it or bythrough [[Polysilicon]].