Polyphosphate and spherical silicate dispenser Polifemo IvarDOSER OF POLYPHOSPHATES AND SILICATES IN POLYPHEMUS BALLS IVAR Code 520210 The polyphosphate and silicate dispenser is a device aimed at protecting boilers , water heaters , washing machines and dishwashers from the formation of limescale and incrustations which compromise their correct use and duration. When a polyphosphate and silicate dispenser is installed on the delivery pipes of a boiler (or other devices crossed by water), its slow release of