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Marshall Excelsior MEGR 253 / 253h Twin Stage Auto Change-Over Regulator


**To maximize the lifespan of the regulator, it must be installed above the liquid level of propane: directly connect to service valve, or wall mount above the propane cylinder(s).

  • 4021


  • Can be used in Commercial and Residential applications
  • Total BTU capacity 350,000 BTU
  • Total BTU Capacity: 225,000 BTU
  • Pressure Output: 11″WC, ~0.5PSI
  • Type: Two Stage
  • Max. Inlet Pressure: 250 PSI
  • Inlet Connection: 1/4” Female Inverted Flare
  • Outlet Connection: 3/8” FNPT
  • Exterior Finish: Raw Zinc / Powder Coat
  • Diaphragm: Fabric Reinforced Molded with O-Ring Bonnet / Body Seal
  • Diaphragm Type: Internal Relief – Spring Loaded
  • Bonnet/ Body Material: Die Cast Zinc
  • Listings: ULLISTED / UL 144
  • Mounting Holes: 3-1/2” On Center
  • Pressure Taps: 1/8” FNPT Plugged

The Model MEGR-253 Automatic Changeover Regulator automatically redirects LP gas vapor flow from an empty service cylinder to a reserve cylinder, without interruption of service. It features an easy to read green indicator which changes to red when the service cylinder needs to be refilled. The MEGR-253 and MEGR-233H Series regulators meet UL, RVIA and NFPA requirements.