The series flow design is suitable for small flow testing and regulation, its features look light and simple, installation simple and convenient, without having to remove the whole machine from the pipeline, you can easily replace the cone tube and float, connection method using hose or metal tube connection. The series flow design is suitable for small flow testing and regulation, its features look light and simple, installation simple and convenient, without having to remove the whole machine from the pipeline, you can easily replace the cone tube and float, connection method using hose or metal tube connection.