Zilmet ZU0007 Boiler Fill Valve 1/2" NPT

The Zilmet ZU0007 1/2" NPT Boiler Fill Valve maintains system water pressure within the hydronic loop by automatically admitting liquid through a connection when the pressure drops below the preset fill limits. Its pressure-regulated mechanism opens and closes in response to variations in system pressure, keeping the hydroelectric circuit in adequately charged without manual intervention during normal operations. Hydraulic heating loops in HVAC systems seat this valve on the cold water supply line to sustain correct operating pressure levels at boilers and distribution piping throughout the heating period and prevent over-pressurization that could damage heat exchangers.