Profile: Silkflow specializes in the installation of water softeners. Sirius water softener has a clear salt lid to monitor salt levels easier, high quality resin for a more economical performance and an adjustable brine valve. This unit is compact and unobtrusive. The twin cylinder design of our unit means that a continuous supply of softened water. The design of the cylinders themselves allows for maximum height inside the unit and providing maximum capacity of water.