Karl Dungs A4 Gas Switch
The Karl Dungs A4 family of gas pressure switches which includes the GAO-, GMH-, and GML-A4 are compact and need no vent in installation. The A4 is a stand alone gas switch and can be piped into any valve gas train by the use of the 1/4" NPT connection on the bottom.


  1. UL. Listed, FM approved, CSA certified.
  2. Comes in either manual or automatic reset.
  3. Easy to read and adjust switch set point.
  4. Incorporated neon light gives easy to read switch status.

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