Stuffing Box Leak Detector

Detect gas or liquid leaks in your stuffing box with our leak detector.


The Leak Detector adapts to all Hercules™ classic stuffing boxes and Hercules Big Stuff stuffing boxes equipped with HPLUG.


  • Components:
    • Pressure-activated shutdown switch
      • Meets NEC Class I, Div. 1 requirements
      • Provides positive shutdown of the flow
      • Easily wired to SCADA or a controller
    • Manifold connection
      • Two ½-in. ports and one ¾-in. port allow custom installation
      • ¾-in. end cap allows easy cleanout of blockage
  • HPLUG required for installation (not included; must purchase separately)
  • Set at 18 psi as standard
  • Available in 1,500, 2,500, and 3,000 psi
  • Production Service Hookup Brochure