The SOLBERG S-ZF Inductor is used to mix foam concentrate with water when the foam concentrate is supplied from a tank at atmospheric pressure. The S-ZF inductor can be installed in deluge systems where sprinklers are used, such as aircraft hangars and storage facilities. The inductor(s) are connected to the water line. The S-ZF is installed inside the pipe work between two flanges. The S-ZF works using the venturi principle. Both low and high viscosity foam concentrates can be used with the S-ZF.