Call · (314) 432-1377
Email ·

ECS Protector Wet SMART Vent

  • For wet pipe fire sprinkler systems
  • Designed specifically for wet pipe nitrogen inerting (WPNI)
  • Rated up to 175 PSIG
  • Patent pending

The ECS Protector Wet SMART Vent (model PSV-W) provides automatic controlled venting of trapped air and other gases from wet pipe fire sprinkler systems. This model includes a vent assembly and a control panel. The device can be used to vent trapped air from wet pipe fire sprinkler system piping and it can also be used in the Wet Pipe Nitrogen Inerting (WPNI) process. The ECS Protector Wet SMART Vent Kit (model PSV-WN) include a nitrogen injection port to be installed at the sprinkler riser.


  • Reduces corrosion by removing oxygen from the sprinkler system
  • During the nitrogen inerting process, the vent remains closed to prevent discharge of nitrogen gas used to displace oxygen, which causes corrosion
  • The vent continues to provide venting of trapped gas that may migrate through the system over time after WPNI process is complete
  • Helps reduce false waterflow alarms created by large pockets of compressed gas in the sprinkler system
  • Vent automatically closes when water has reached the device
  • Redundant design with both electronic and mechanical closure eliminates need to plumb to drain


  • Includes electronic solenoid valve wired to control panel that automatically closes vent when water reaches conductance probe
  • On/off switch provided on control panel to close vent during system maintenance and testing
  • Integrated pressure regulating device rated for 40 psi on gas discharge piping assembly to prevent discharge during WPNI process
  • Gas sample port provides location to verify nitrogen concentration of fire sprinkler system
  • Temperature range: 40-120 degrees F (4.5-49 degrees C) 

Installation Notes

  • Install vent assembly remotely on system and nitrogen injection port at riser above system control valve
  • If a location for the vent isn’t provided on project design documents, vent can be installed at an accessible remote high point on the system 
  • Mount control panel on wall or column adjacent to vent
  • Installing contractor must wire vent assembly to control panel in protected assembly or conduit (not included)
  • Do NOT install in location downstream of water trap