Overflow Nozzles are designed for filling thinner liquid products dispensed from an overflow filler. Volumetric Technologies manufactures a wide variety of overflow nozzles for our overflow fillers, as well as overflow nozzle replacements for other brands. Overflow nozzles dive into the container and are compressed open, allowing the product to flow through the nozzle. When the container is full, it overflows into the return line, the nozzle is then retracted and the product flow is shut off.