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

The MEGR-253H is a twin-stage propane regulator with an automatic change-over feature. It’s designed to seamlessly switch gas flow from a depleted service cylinder to a reserve cylinder without interrupting service. The regulator delivers a stable low pressure (~11″ water column, approx. 0.5 PSI), suitable for residential and commercial propane systems.

Key Features

• Twin-stage regulation for consistent and reliable output pressure

• Automatic change-over design ensures uninterrupted service between cylinders

• Pressure output: ~ 11″ WC (~0.5 PSI)

• Max inlet pressure up to 250 PSIG

• Inlet connection: ¼″ female inverted flare

• Outlet connection: ⅜″ FNPT

• Fabric-reinforced molded diaphragm with O-ring bonnet/body seal for durability

• Internal spring-loaded relief valve for over-pressure protection

• Body and bonnet made of die-cast zinc, with raw zinc and powder-coat exterior finish

• Equipped with pressure taps (1⁄8″ FNPT, plugged) for testing/monitoring

• Mounting holes: 3½″ on center

• Meets UL, UL-144 standards; RVIA and NFPA certified

Specifications

Applications

• Residential and commercial LP-gas systems requiring continuous service (i.e. switching between two cylinders)

• Homes or sites with dual/cylinder propane setups needing automatic switchover

• Where stable ~0.5 PSI delivery is required for appliances downstream

• Locations requiring certified safety and performance (per UL, NFPA, RVIA)

Why Choose MEGR-253H

The MEGR-253H enables uninterrupted propane supply with its auto change-over mechanism, maintaining safe and steady pressure. It's designed for safety, longevity, and convenience, with solid materials, internal relief protection, and testing ports built in. Ideal for setups where having always-on gas service (without manual cylinder swapping) is critical.