Caleffi 573403A 1/2" NPT Dual Check Backflow Preventer w/ Atmospheric Vent

The Caleffi 573403A Dual-Check Backflow Preventer with Atmospheric Vent 1/2” NPT is a reliable equipment that is used to prevent backflow of possibly contaminated water into potable water systems. It has dual check valves and atmospheric vent, which will ensure that any backflow is safely vented before it gets back into the supply line. Suitable for HVAC systems this backflow preventer is widely applied in cooling and heating systems, such as boilers and water-source heat pumps. Advantages include decreased chance of contamination, increased system safety, and increased longevity of HVAC equipment due to the prevention of unwanted water flow.