Zilmet ZU0008 Backflow Prevention 1/2" NPT

The Zilmet ZU0008 Backflow Prevention is a backflow prevention component used in hydronic piping system. It allows fluid to move in one direction while restricting reverse flow within the circuit in HVAC systems. It is commonly installed in chilled water lines, boiler systems, and expansion vessel connections to maintain correct flow direction. The component helps protect pumps, valves, and pressure-sensitive equipment from reverse pressure conditions and contamination. With 1/2" NPT threaded ends, it integrates into in-line pipework where controlled circulation and system stability are required during operation and maintenance of install.